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arXiv 2024年

作者： LaBella, Dominic Schumacher, Katherine Mix, Michael Leu, Kevin McBurney-Lin, Shan Nedelec, Pierre Villanueva-Meyer, Javier Shapey, Jonathan Vercauteren, Tom Chia, Kazumi Ivory, Marina Barfoot, Theodore Al-Salihi, Omar Leu, Justin Halasz, Lia Velichko, Yury Wang, Chunhao Kirkpatrick, John Floyd, Scott Reitman, Zachary J. Mullikin, Trey Bagci, Ulas Sachdev, Sean Hattangadi-Gluth, Jona A. Seibert, Tyler M. Farid, Nikdokht Puett, Connor Pease, Matthew W. Shiue, Kevin Anwar, Syed Muhammad Faghani, Shahriar Taylor, Peter Haider, Muhammad Ammar Warman, Pranav Albrecht, Jake Jakab, András Moassefi, Mana Chung, Verena Aristizabal, Alejandro Karargyris, Alexandros Kassem, Hasan Pati, Sarthak Sheller, Micah Coley, Aaron Huang, Christina Ghanta, Siddharth Schneider, Alex Sharp, Conrad Saluja, Rachit Kofler, Florian Lohmann, Philipp Vollmuth, Phillipp Gagnon, Louis Adewole, Maruf Li, Hongwei Bran Kazerooni, Anahita Fathi Tahon, Nourel Hoda Anazodo, Udunna Moawad, Ahmed W. Menze, Bjoern Linguraru, Marius George Aboian, Mariam Wiestler, Benedikt Baid, Ujjwal Conte, Gian-Marco Rauschecker, Andreas M. Nada, Ayman Abayazeed, Aly H. Huang, Raymond de Verdier, Maria Correia Rudie, Jeffrey D. Bakas, Spyridon Calabrese, Evan Department of Radiation Oncology Duke University Medical Center DurhamNC United States Department of Radiation Oncology SUNY Upstate Medical University SyracuseNY United States San FranciscoCA United States Department of Neurosurgery King’s College Hospital London United Kingdom School of Biomedical Engineering and Imaging Sciences King’s College London London United Kingdom Guy’s and St Thomas’ NHS Foundation Trust United Kingdom Department of Radiation Oncology University of Washington SeattleWA United States Department of Radiology Northwestern University EvanstonIL United States Department of Radiation Oncology Northwestern University EvanstonIL United States Department of Radiation Medicine and Applied Sciences University of California San Diego La Jolla CA United States Department of Radiology University of California San Diego La Jolla CA United States Department of Bioengineering University of California San Diego La Jolla CA United States Department of Neurological Surgery Indiana University School of Medicine IndianapolisIN United States Department of Radiation Oncology Indiana University IndianapolisIN United States Children’s National Hospital WashingtonDC United States George Washington University WashingtonDC United States Mayo Clinic RochesterMN United States CMH Lahore Medical College Lahore Pakistan Duke University Medical Center School of Medicine DurhamNC United States Sage Bionetworks United States University of Zürich Zürich Switzerland Artificial Intelligence Lab Department of Radiology Mayo Clinic RochesterMN United States MLCommons United States Factored AI United States Center For Federated Learning in Medicine Indiana University IndianapolisIN United States Division of Computational Pathology Department of Pathology and Laboratory Medicine Indiana University School of Medicine IndianapolisIN United States Medical Working Group MLCommons San FranciscoCA United States Intel United States Duke Universi

The 2024 Brain Tumor Segmentation Meningioma Radiotherapy (BraTS-MEN-RT) challenge aims to advance automated segmentation algorithms using the largest known multi-institutional dataset of 750 radiotherapy planning brain MRIs with expert-annotated target labels for patients with intact or postoperative meningioma that underwent either conventional external beam radiotherapy or stereotactic radiosurgery. Each case includes a defaced 3D post-contrast T1-weighted radiotherapy planning MRI in its native acquisition space, accompanied by a single-label "target volume" representing the gross tumor volume (GTV) and any at-risk postoperative site. Target volume annotations adhere to established radiotherapy planning protocols, ensuring consistency across cases and institutions. For preoperative meningiomas, the target volume encompasses the entire GTV and associated nodular dural tail, while for postoperative cases, it includes at-risk resection cavity margins as determined by the treating institution. Case annotations were reviewed and approved by expert neuroradiologists and radiation oncologists. Participating teams will develop, containerize, and evaluate automated segmentation models using this comprehensive dataset. Model performance will be assessed using an adapted lesion-wise Dice Similarity Coefficient and the 95% Hausdorff distance. The top-performing teams will be recognized at the Medical Image Computing and Computer Assisted Intervention Conference in October 2024. BraTS-MEN-RT is expected to significantly advance automated radiotherapy planning by enabling precise tumor segmentation and facilitating tailored treatment, ultimately improving patient outcomes. © 2024, CC BY.

关键词： Radiotherapy

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UNCOVER: A NIRSpec Census of Lensed Galaxies at z = 8.50-13.08 Probing a High AGN Fraction and Ionized Bubbles in the Shadow

arXiv

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arXiv 2023年

作者： Fujimoto, Seiji Wang, Bingjie Weaver, John R. Kokorev, Vasily Atek, Hakim Bezanson, Rachel Labbe, Ivo Brammer, Gabriel Greene, Jenny E. Chemerynska, Iryna Dayal, Pratika de Graaff, Anna Furtak, Lukas J. Oesch, Pascal A. Setton, David J. Price, Sedona H. Miller, Tim B. Williams, Christina C. Whitaker, Katherine E. Zitrin, Adi Cutler, Sam E. Leja, Joel Pan, Richard Coe, Dan van Dokkum, Pieter Feldmann, Robert Fudamoto, Yoshinobu Goulding, Andy D. Khullar, Gourav Marchesini, Danilo Maseda, Michael Nanayakkara, Themiya Nelson, Erica J. Smit, Renske Stefanon, Mauro Weibel, Andrea Department of Astronomy The University of Texas at Austin AustinTX78712 United States Department of Astronomy & Astrophysics The Pennsylvania State University University ParkPA16802 United States Institute for Computational & Data Sciences The Pennsylvania State University University ParkPA16802 United States Institute for Gravitation and the Cosmos The Pennsylvania State University University ParkPA16802 United States Department of Astronomy University of Massachusetts AmherstMA01003 United States Kapteyn Astronomical Institute University of Groningen Groningen9700 AV Netherlands Institut d'Astrophysique de Paris CNRS Sorbonne Université 98bis Boulevard Arago Paris75014 France Department of Physics and Astronomy PITT PACC University of Pittsburgh PittsburghPA15260 United States Centre for Astrophysics and Supercomputing Swinburne University of Technology MelbourneVIC3122 Australia Niels Bohr Institute University of Copenhagen Jagtvej 128 København NDK-2200 Denmark Department of Astrophysical Sciences Princeton University 4 Ivy Lane PrincetonNJ08544 United States Max-Planck-Institut für Astronomie Königstuhl 17 HeidelbergD-69117 Germany Physics Department Ben-Gurion University of the Negev P.O. Box 653 Be'er-Sheva84105 Israel Department of Astronomy University of Geneva Chemin Pegasi 51 Versoix1290 Switzerland Department of Astronomy Yale University New HavenCT06511 United States Department of Physics and Astronomy Northwestern University 1800 Sherman Ave EvanstonIL60201 United States NSF's National Optical-Infrared Astronomy Research Laboratory 950 N. Cherry Avenue TucsonAZ85719 United States Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721 United States Department of Physics and Astronomy Tufts University 574 Boston Ave. MedfordMA02155 United States 3700 San Martin Drive BaltimoreMD21218 United States United States Center for Astrophysical Sciences Department of Physics

We present JWST NIRSpec prism spectroscopy of lensed galaxies at z 9 found behind the massive galaxy cluster Abell 2744 in the UNCOVER Cycle 1 Treasury Program. We confirm the redshift via emission lines and/or the Lyα break for ten galaxies at z = 8.50-13.08 down to MUV = −17.3. We achieve a 100% confirmation rate for z > 9 candidates reported in Atek et al. (2023b). Using six sources with multiple line detections, we find that offsets in redshift estimates between the lines and the Lyα break alone can be ±0.2, raising caution in designing future follow-up spectroscopy for the break-only sources. With spec-z confirmed sources in UNCOVER and literature, we derive lower limits on the rest-frame ultraviolet (UV) luminosity function (LF) at z 9-12 and find that these lower limits agree with recent photometric measurements. We identify at least two unambiguous and several possible active galactic nucleus (AGN) systems based on X-ray, broad Hβ, high ionization lines (e.g., N iv] λ1487, C iv λ1549), and excess in UVLF. This requires the AGN LFs at z 9-10 to be comparable or even higher than the X-ray AGN LF estimated at z ∼ 6 and suggests a plausible cause of the high abundance of z > 9 galaxies claimed in the recent photometric measurements is AGNs. One UV-luminous source is confirmed at the same redshift as a broad-line AGN at z = 8.50 with a physical separation of 380 kpc in the source plane. These two sources show the emission blueward of Lyα, indicating a giant ionized bubble enclosing them with a radius of 7.69 ± 0.18 pMpc. Our results imply that AGNs have a non-negligible contribution to cosmic reionization. © 2023, CC BY.

关键词： Cosmology

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UNCOVER: The growth of the first massive black holes from JWST/NIRSpec – spectroscopic redshift confirmation of an X-ray luminous AGN at z=10.1

arXiv

引用

arXiv 2023年

作者： Goulding, Andy D. Greene, Jenny E. Setton, David J. Labbe, Ivo Bezanson, Rachel Miller, Tim B. Atek, Hakim Bogdán, Ákos Brammer, Gabriel Chemerynska, Iryna Cutler, Sam E. Dayal, Pratika Fudamoto, Yoshinobu Fujimoto, Seiji Furtak, Lukas J. Kokorev, Vasily Khullar, Gourav Leja, Joel Marchesini, Danilo Natarajan, Priyamvada Nelson, Erica Oesch, Pascal A. Pan, Richard Papovich, Casey Price, Sedona H. van Dokkum, Pieter Wang, Bingjie Weaver, John R. Whitaker, Katherine E. Zitrin, Adi Department of Astrophysical Sciences Princeton University PrincetonNJ08544 United States Department of Physics and Astronomy PITT PACC University of Pittsburgh PittsburghPA15260 United States Centre for Astrophysics and Supercomputing Swinburne University of Technology MelbourneVIC3122 Australia Department of Astronomy Yale University New HavenCT06511 United States Department of Physics and Astronomy Northwestern University 1800 Sherman Ave EvanstonIL60201 United States Institut d’Astrophysique de Paris CNRS Sorbonne Université 98bis Boulevard Arago Paris75014 France Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States Niels Bohr Institute University of Copenhagen Jagtvej 128 København NDK-2200 Denmark Department of Astronomy University of Massachusetts AmherstMA01003 United States Kapteyn Astronomical Institute University of Groningen Groningen9700 AV Netherlands Waseda Research Institute for Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo Japan Department of Astronomy The University of Texas at Austin AustinTX78712 United States Physics Department Ben-Gurion University of the Negev P.O. Box 653 Be’er-Sheva84105 Israel Kapteyn Astronomical Institute University of Groningen P.O. Box 800 Groningen9700AV Netherlands Department of Astronomy & Astrophysics The Pennsylvania State University University ParkPA16802 United States Institute for Computational & Data Sciences The Pennsylvania State University University ParkPA16802 United States Institute for Gravitation and the Cosmos The Pennsylvania State University University ParkPA16802 United States Physics and Astronomy Department Tufts University 574 Boston Ave. MedfordMA02155 United States Department of Physics Yale University New HavenCT06520 United States Black Hole Initiative

The James Webb Space Telescope is now detecting early black holes (BHs) as they transition from "seeds" to supermassive BHs. Recently, Bogdan et al. (2023) reported the detection of an X-ray luminous supermassive BH, UHZ-1, with a photometric redshift at z > 10. Such an extreme source at this very high redshift provides new insights on seeding and growth models for BHs given the short time available for formation and growth. Harnessing the exquisite sensitivity of JWST/NIRSpec, here we report the spectroscopic confirmation of UHZ-1 at z = 10.073±0.002. We find that the NIRSpec/Prism spectrum is typical of recently discovered z ≈ 10 galaxies, characterized primarily by star-formation features. We see no clear evidence of the powerful X-ray source in the rest-frame UV/optical spectrum, which may suggest heavy obscuration of the central BH, in line with the Compton-thick column density measured in the X-rays. We perform a stellar population fit simultaneously to the new NIRSpec spectroscopy and previously available photometry. The fit yields a stellar mass estimate for the host galaxy that is significantly better constrained than prior photometric estimates (M* ∼ 1.4+0−034 × 108 M☉). Given the predicted BH mass (MBH ∼ 107 − 108 M☉), the resulting ratio of MBH/M* remains two to three orders of magnitude higher than local values, thus lending support to the heavy seeding channel for the formation of supermassive BHs within the first billion years of cosmic evolution. Copyright © 2023, The Authors. All rights reserved.

关键词： Black holes

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HIP 33609 b: An Eccentric Brown Dwarf Transiting a V=7.3 Rapidly Rotating B-Star

arXiv

引用

arXiv 2023年

作者： Vowell, Noah Rodriguez, Joseph E. Quinn, Samuel N. Zhou, George Vanderburg, Andrew Mann, Andrew W. Hooton, Matthew J. Stassun, Keivan G. Howard, Saburo Bieryla, Allyson Latham, David W. Howell, Steve B. Guillot, Tristan Ziegler, Carl Collins, Karen A. Carmichael, Theron W. Jenkins, Jon M. Shporer, Avi Abe, Lyu Bendjoya, Philippe Bush, Jonathan L. Buttu, Marco Collins, Kevin I. Eastman, Jason D. Fields, Matthew J. Gasparetto, Thomas Günther, Maximilian N. Kostov, Veselin B. Kraus, Adam L. Lester, Kathryn V. Levine, Alan M. Littlefield, Colin Marie-Sainte, Wenceslas Mékarnia, Djamel Osborn, Hugh P. Rapetti, David Ricker, George R. Seager, S. Srdoc, Gregor Suarez, Olga Torres, Guillermo Triaud, Amaury H.M.J. Vanderspek, R. Winn, Joshua N. Center for Data Intensive and Time Domain Astronomy Department of Physics and Astronomy Michigan State University East LansingMI48824 United States Center for Astrophysics | Harvard & Smithsonian 60 Garden St CambridgeMA02138 United States University of Southern Queensland West St Darling HeightsQLD4350 Australia Department of Physics Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics and Astronomy The University of North Carolina at Chapel Hill Chapel HillNC27599 United States Cavendish Laboratory JJ Thomson Avenue CambridgeCB3 0HE United Kingdom Department of Physics and Astronomy Vanderbilt University NashvilleTN37235 United States Department of Physics Fisk University 1000 17th Avenue North NashvilleTN37208 United States Université Côte d’Azur Observatoire de la Côte d’Azur CNRS Lagrange Laboratory Nice France NASA Ames Research Center Moffett FieldCA94035 United States Department of Physics Engineering and Astronomy Stephen F. Austin State University 1936 North St NacogdochesTX75962 United States Institute for Astronomy University of Edinburgh Royal Observatory Blackford Hill EdinburghEH9 3HJ United Kingdom INAF - Osservatorio Astronomico di Cagliari Cagliari Italy George Mason University 4400 University Drive FairfaxVA22030 United States Institute of Polar Sciences CNR via Torino 155 Venice-Mestre30172 Italy Keplerlaan 1 Noordwijk2201 AZ Netherlands NASA Goddard Space Flight Center 8800 Greenbelt Road GreenbeltMD20771 United States SETI Institute 189 Bernardo Ave Suite 200 Mountain ViewCA94043 United States Department of Astronomy The University of Texas at Austin AustinTX78712 United States Bay Area Environmental Research Institute Moffett FieldCA94035 United States Institut Paul Emile Victor Concordia Station Antarctica Physikalisches Institut University of Bern Gesellsschaftstrasse 6 Bern3012 Switzerland Re

We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B-star, discovered by NASA’s Transiting Exoplanet Survey Satellite (TESS) as TOI-588 b. HIP 33609 b is a large (Rb = 1.580+0.074-0.070 RJ) brown dwarf on a highly eccentric (e = 0.560+0.029-0.031) orbit with a 39-day period. The host star is a bright (V = 7.3 mag), Teff = 10,400+800-660 K star with a mass of M∗= 2.383+0.10-0.095 Mo and radius of R∗= 1.863+0.087-0.082 Ro, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion’s mass of Mb = 68.0+7.4-7.1 MJ as well as the host star’s rotation rate (vsini∗ = 55.6 ±1.8 km/s). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models. Copyright © 2023, The Authors. All rights reserved.

关键词： Orbits

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Author Correction: Multi-ancestry genome-wide association analyses improve resolution of genes and pathways influencing lung function and chronic obstructive pulmonary disease risk

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Nature genetics 2023年第10期55卷 1778-1779页

作者： Nick Shrine Abril G Izquierdo Jing Chen Richard Packer Robert J Hall Anna L Guyatt Chiara Batini Rebecca J Thompson Chandan Pavuluri Vidhi Malik Brian D Hobbs Matthew Moll Wonji Kim Ruth Tal-Singer Per Bakke Katherine A Fawcett Catherine John Kayesha Coley Noemi Nicole Piga Alfred Pozarickij Kuang Lin Iona Y Millwood Zhengming Chen Liming Li Sara R A Wijnant Lies Lahousse Guy Brusselle Andre G Uitterlinden Ani Manichaikul Elizabeth C Oelsner Stephen S Rich R Graham Barr Shona M Kerr Veronique Vitart Michael R Brown Matthias Wielscher Medea Imboden Ayoung Jeong Traci M Bartz Sina A Gharib Claudia Flexeder Stefan Karrasch Christian Gieger Annette Peters Beate Stubbe Xiaowei Hu Victor E Ortega Deborah A Meyers Eugene R Bleecker Stacey B Gabriel Namrata Gupta Albert Vernon Smith Jian'an Luan Jing-Hua Zhao Ailin F Hansen Arnulf Langhammer Cristen Willer Laxmi Bhatta David Porteous Blair H Smith Archie Campbell Tamar Sofer Jiwon Lee Martha L Daviglus Bing Yu Elise Lim Hanfei Xu George T O'Connor Gaurav Thareja Omar M E Albagha Karsten Suhre Raquel Granell Tariq O Faquih Pieter S Hiemstra Annelies M Slats Benjamin H Mullin Jennie Hui Alan James John Beilby Karina Patasova Pirro Hysi Jukka T Koskela Annah B Wyss Jianping Jin Sinjini Sikdar Mikyeong Lee Sebastian May-Wilson Nicola Pirastu Katherine A Kentistou Peter K Joshi Paul R H J Timmers Alexander T Williams Robert C Free Xueyang Wang John L Morrison Frank D Gilliland Zhanghua Chen Carol A Wang Rachel E Foong Sarah E Harris Adele Taylor Paul Redmond James P Cook Anubha Mahajan Lars Lind Teemu Palviainen Terho Lehtimäki Olli T Raitakari Jaakko Kaprio Taina Rantanen Kirsi H Pietiläinen Simon R Cox Craig E Pennell Graham L Hall W James Gauderman Chris Brightling James F Wilson Tuula Vasankari Tarja Laitinen Veikko Salomaa Dennis O Mook-Kanamori Nicholas J Timpson Eleftheria Zeggini Josée Dupuis Caroline Hayward Ben Brumpton Claudia Langenberg Stefan Weiss Georg Homuth Carsten Oliver Schmidt Nicole Probst-Hensch Marjo-Riitta Jarvelin Alanna C Morrison Ozren Polasek Igor Department of Population Health Sciences University of Leicester Leicester UK. nick.shrine@leicester.ac.uk. Department of Population Health Sciences University of Leicester Leicester UK. Division of Respiratory Medicine and NIHR Nottingham Biomedical Research Centre University of Nottingham Nottingham UK. Leicester National Institute for Health and Care Research Biomedical Research Centre Glenfield Hospital Leicester UK. Channing Division of Network Medicine Division of Pulmonary and Critical Care Medicine Department of Medicine Brigham and Women's Hospital Boston MA USA. Harvard Medical School Boston MA USA. COPD Foundation Washington DC USA. Department of Clinical Science Unversity of Bergen Bergen Norway. Nuffield Department of Population Health University of Oxford Oxford UK. MRC Population Health Research Unit University of Oxford Oxford UK. Department of Epidemiology and Biostatistics School of Public Health Peking University Health Science Center Beijing China. Department of Respiratory Diseases Ghent Universital Hospital Ghent Belgium. Department of Bioanalysis Faculty of Pharmaceutical Sciences Ghent University Ghent Belgium. Department of Epidemiology Eramus Medical Center Rotterdam The Netherlands. Department of Internal Medicine Eramus Medical Center Rotterdam The Netherlands. Center for Public Health Genomics University of Virginia Charlottesville VA USA. Department of Medicine Columbia University Medical Center New York NY USA. Medical Research Council Human Genetics Unit Institute of Genetics and Cancer University of Edinburgh Edinburgh UK. Human Genetics Center Department of Epidemiology Human Genetics and Environmental Sciences School of Public Health The University of Texas Health Science Center at Houston Houston TX USA. MRC Centre for Environment and Health Department of Epidemiology and Biostatistics School of Public Health Imperial College London London UK. Department of Epidemiology and Public Health Swiss Tropical

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Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS

arXiv

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arXiv 2023年

作者： Psaridi, Angelica Bouchy, François Lendl, Monika Akinsanmi, Babatunde Stassun, Keivan G. Smalley, Barry Armstrong, David J. Howard, Saburo Ulmer-Moll, Solène Grieves, Nolan Barkaoui, Khalid Rodriguez, Joseph E. Bryant, Edward M. Suárez, Olga Guillot, Tristan Evans, Phil Attia, Omar Wittenmyer, Robert A. Yee, Samuel W. Collins, Karen A. Zhou, George Galland, Franck Parc, Léna Udry, Stéphane Figueira, Pedro Ziegler, Carl Mordasini, Christoph Winn, Joshua N. Seager, Sara Jenkins, Jon M. Twicken, Joseph D. Brahm, Rafael Jones, Matías I. Abe, Lyu Addison, Brett Briceño, César Briegal, Joshua T. Collins, Kevin I. Daylan, Tansu Eigmüller, Phillip Furesz, Gabor Guerrero, Natalia M. Hagelberg, Janis Heitzmann, Alexis Hounsell, Rebekah Huang, Chelsea X. Krenn, Andreas Law, Nicholas M. Mann, Andrew W. McCormac, James Mékarnia, Djamel Mounzer, Dany Nielsen, Louise D. Osborn, Ares Reinarz, Yared Sefako, Ramotholo R. Steiner, Michal Strøm, Paul A. Triaud, Amaury H.M.J. Vanderspek, Roland Vanzi, Leonardo Vines, Jose I. Watson, Christopher A. Wright, Duncan J. Zapata, Abner Observatoire de Genève Université de Genève Chemin Pegasi 51 Versoix1290 Switzerland Vanderbilt University Department of Physics & Astronomy 6301 Stevenson Center Lane NashvilleTN37235 United States Astrophysics Group Keele University StaffordshireST5 5BG United Kingdom Department of Physics University of Warwick Gibbet Hill Road CoventryCV4 7AL United Kingdom Centre for Exoplanets and Habitability University of Warwick Gibbet Hill Road CoventryCV4 7AL United Kingdom Université Côte d’Azur Observatoire de la Côte d’Azur CNRS Laboratoire Lagrange Bd de l’Observatoire CS 34229 Nicecedex 4 06304 France Physikalisches Institut University of Bern Gesellschaftsstrasse 6 Bern3012 Switzerland Astrobiology Research Unit Université de Liège 19C Allée du 6 Août Liège4000 Belgium Department of Earth Atmospheric and Planetary Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Calle Vía Láctea s/n Tenerife La Laguna38200 Spain Center for Data Intensive and Time Domain Astronomy Department of Physics and Astronomy Michigan State University East LansingMI48824 United States Mullard Space Science Laboratory University College London Holmbury St Mary Surrey DorkingRH5 6NT United Kingdom El Sauce Observatory Coquimbo Province Chile University of Southern Queensland Centre for Astrophysics West Street ToowoombaQLD4350 Australia Department of Astrophysical Sciences Princeton University PrincetonNJ08544 United States Center for Astrophysics | Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States University of Grenoble Alpes CNRS IPAG GrenobleF-38000 France Instituto de Astrofísica e Ciências do Espaço Universidade do Porto CauP Rua das Estrelas Porto4150-762 Portugal Department of Physics Engineering and Astronomy Stephen F. Austin State University 1936 North St NacogdochesTX75962 United States Department of Physics Kavli Institute for Astrophysics and Space Research

While the sample of confirmed exoplanets continues to grow, the population of transiting exoplanets around early-type stars is still limited. These planets allow us to investigate the planet properties and formation pathways over a wide range of stellar masses and study the impact of high irradiation on hot Jupiters orbiting such stars. We report the discovery of TOI-615b, TOI-622b, and TOI-2641b, three Saturn-mass planets transiting main sequence, F-type stars. The planets were identified by the Transiting Exoplanet Survey Satellite (TESS) and confirmed with complementary ground-based and radial velocity observations. TOI-615b is a highly irradiated (∼1277 F⊕) and bloated Saturn-mass planet (formula presented) in a 4.66 day orbit transiting a 6850 K star. TOI-622b has a radius of (formula presented) RJup and a mass of (formula presented) in a 6.40 day orbit. Despite its high insolation flux (∼600 F⊕), TOI-622b does not show any evidence of radius inflation. TOI-2641b is a (formula presented) planet in a 4.88 day orbit with a grazing transit (formula presented) that results in a poorly constrained radius of (formula presented). Additionally, TOI-615b is considered attractive for atmospheric studies via transmission spectroscopy with ground-based spectrographs and JWST. Future atmospheric and spin-orbit alignment observations are essential since they can provide information on the atmospheric composition, formation, and migration of exoplanets across various stellar types. © 2023, CC BY.

关键词： Stars

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APOGEE-centric Ananke Simulations in a SciServer SQL database

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Research Notes of the AAS 2022年第6期6卷 125-125页

作者： Rachael L. Beaton Suzanne Werner Arik W. Mitschang Gerard Lemson Aniruddha Thakar Anne-Marie Weijmans Joel R. Brownstein Farnik Nikakhtar Robyn E. Sanderson Andrew Wetzel Sarah Loebman Sanjib Sharma Space Telescope Science Institute 3700 San Martin Drive Baltimore MD 21218 USA rbeaton@princeton.edu Department of Astrophysical Sciences Princeton University 4 Ivy Lane Princeton NJ 08544 USA The Observatories of the Carnegie Institution for Science 813 Santa Barbara St. Pasadena CA 91101 USA Institute For Data Intensive Engineering and Science Johns Hopkins University. 3701 San Martin Drive Baltimore MD 21218 USA Center for Astrophysical Sciences Department of Physics and Astronomy Johns Hopkins University 3400 North Charles Street Baltimore MD 21218 USA School of Physics and Astronomy University of St Andrews North Haugh St Andrews KY16 9SS UK Department of Physics and Astronomy University of Utah 115 S. 1400 E. Salt Lake City UT 84112 USA Department of Physics & Astronomy University of Pennsylvania 209 S 33rd St. Philadelphia PA 19104 USA Center for Computational Astrophysics Flatiron Institute 162 5th Ave New York NY 10010 USA Department of Physics & Astronomy University of California Davis CA 95616 USA Department of Physics University of California Merced 5200 North Lake Rd. Merced CA 95343 USA Sydney Institute for Astronomy School of Physics A28 The University of Sydney NSW 2006 Australia Center of Excellence for Astrophysics in Three Dimensions (ASTRO-3D) Australia

Modern galaxy simulations have reached the complexity required to create sophisticated mock catalogs. Ananke is a set of nine mock catalogs constructed from synthetic surveys of three Milky Way-like galaxies from the Latte suite of FIRE simulations. Ananke provides observed quantities for comparison with modern large-scale stellar surveys. In SDSS-IV DR17, mock catalogs for the Apache Point Galactic Evolution Experiment (APOGEE) were built from Ananke synthetic surveys as a Value-Added Catalog, but were only provided as large flat files (∼>10's GB). Here we announce an >40 Tb SQL database for nine APOGEE-specific mock catalogs and describe additions to the data model necessary for effective user queries. The catalogs can be accessed on the free, science platform, SciServer—supported by the Institute for data intensive engineering and science at the Johns Hopkins University (IDIES); SciServer supports server-side analysis with commonly used coding languages and tools.

关键词： Catalogs Milky Way Galaxy Surveys Redshift surveys Astronomy databases

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Method for the calculation of the Hamaker constants of organic materials by the Lifshitz macroscopic approach with DFT

arXiv

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arXiv 2019年

作者： Takagishi, Hideyuki Masuda, Takashi Shimoda, Tatsuya Maezono, Ryo Hongo, Kenta School of Materials Science JAIST Asahidai 1-1 Nomi Ishikawa923-1292 Japan School of Information Science JAIST Asahidai 1-1 Nomi Ishikawa923-1292 Japan Computational Engineering Applications Unit RIKEN 2-1 Hirosawa Wako Saitama351-0198 Research Center for Advanced Computing Infrastructure JAIST Asahidai 1-1 Nomi Ishikawa923-1292 Japan Center for Materials Research by Information Integration Research Services Division of Materials Data and Integrated System National Institute for Materials Science Tsukuba305-0047 PRESTO Japan Science and Technology Agency 4-1-8 Honcho Kawaguchi-shi Saitama322-0012 Japan

The Hamaker constants, which are coefficients providing quantitative information on intermolecular forces, were calculated for a number of different materials according to the Lifshitz theory via simple DFT calculations without any experimental measurements being performed. The physical properties (polarizability, dipole moment, molecular volume, and vibrational frequency) of organic molecules were calculated using the B3LYP density functional and the aug-cc-pVDZ basis set. Values for the Hamaker constants were obtained using the approximation of the Lorentz-Lorenz equation and Onsager's equation with these properties. It was found that, in the case of 'non-associative' materials, like hydrocarbons, ethers, ketones, aldehydes, carboxylic acids, esters, nitriles, and hydrosilanes, and halides, the calculated Hamaker constants were similar in value to their experimentally determined counterparts. Moreover, with this calculation method, it is easy to create the molecular model and the CPU time can be shortened. Copyright © 2019, The Authors. All rights reserved.

关键词： Ketones

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Soft MAX phases with boron substitution: A computational prediction

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Physical Review Materials 2018年第10期2卷 103605-103605页

作者： Poulami Chakraborty Aurab Chakrabarty Amlan Dutta Tanusri Saha-Dasgupta Department of Condensed Matter Physics and Materials Science S. N. Bose National Centre for Basic Sciences JD Block Sector III Salt Lake Kolkata 700106 India Department of Metallurgical and Materials Engineering Indian Institute of Technology Kharagpur Kharagpur 721302 India Center for Mathematical Computational and Data Science Indian Association for the Cultivation of Science Kolkata 700032 India

With a goal to improve upon the mechanical properties of the MAX phase, materials of high technological interest, we explore boron substitution in these compounds. Employing first-principles density functional theory (DFT) calculations, combined with continuum modeling to access the core structure of dislocations, we investigate the effect of boron-substitution on plastic deformation properties of a typical MAX phase compound, V2AlC. Our T=0 K results show that, due to the differential nature of chemical bonding between V and B compared to that between V and C, both V-Al and V-B basal slip planes get activated in boron-substituted compounds, compared to only V-Al basal slip in the parent compound. This, in turn, makes the boron compounds significantly more ductile compared to their carbide counterpart V2AlC. The computation of temperature-dependent free energies of stable and unstable stacking faults further reveals the important and interesting role of thermal fluctuations in the deformation behavior of the boride compounds at elevated temperature. This suggests a change in the microscopic mechanism of plastic deformation upon varying temperature condition in the proposed boron compounds. Our study should motivate future exploration of boron-based MAX compounds.

关键词： Plasticity

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Correction: Co-infection and ICU-acquired infection in COVID-19 ICU patients: a secondary analysis of the UNITE-COVID data set

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Critical care (London, England) 2022年第1期26卷 249页

作者： Andrew Conway Morris Katharina Kohler Thomas De Corte Ari Ercole Harm-Jan De Grooth Paul W G Elbers Pedro Povoa Rui Morais Despoina Koulenti Sameer Jog Nathan Nielsen Alasdair Jubb Maurizio Cecconi Jan De Waele Division of Anaesthesia Department of Medicine Level 4 Addenbrooke's Hospital University of Cambridge Hills Road Cambridge UK. Ac926@cam.ac.uk. Division of Immunology Department of Pathology University of Cambridge Cambridge UK. Ac926@cam.ac.uk. JVF Intensive Care Unit Addenbrooke's Hospital Cambridge UK. Ac926@cam.ac.uk. Division of Anaesthesia Department of Medicine Level 4 Addenbrooke's Hospital University of Cambridge Hills Road Cambridge UK. Department of Intensive Care Medicine Ghent University Hospital Ghent Belgium. Dept of Internal Medicine and Pediatrics Faculty of Medicine and Health Sciences Ghent University Ghent Belgium. Neurocritical Care Unit Addenbrooke's Hospital Cambridge UK. Department of Intensive Care Amsterdam UMC Location Vrije Universiteit Amsterdam Amsterdam The Netherlands. Laboratory for Critical Care Computational Intelligence Amsterdam Medical Data Science Amsterdam UMC Vrije Universiteit Amsterdam The Netherlands. Nova Medical School New University Lisbon Portugal. Center for Clinical Epidemiology and Research Unit of Clinical Epidemiology OUH Odense University Hospital Odense Denmark. Polyvalent Intensive Care Unit Hospital de São Francisco Xavier CHLO Lisbon Portugal. 2Nd Critical Care Department Attikon University Hospital University of Athens Athens Greece. UQ Centre for Clinical Research (UQCCR) Faculty of Medicine The University of Queensland Brisbane Australia. Deenanath Mangeshkar Hospital and Research Center Pune India. Divisions of Pulmonary Critical Care and Sleep Medicine and Transfusion Medicine University of New Mexico School of Medicine Albuquerque NM USA. Department of Anaesthesia Humanitas University Milan Italy.

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