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arXiv 2021年

作者： Bennet, Paul Sand, D.J. Crnojević, D. Weisz, D.R. Caldwell, N. Guhathakurta, P. Hargis, J.R. Karunakaran, A. Mutlu-Pakdil, B. Olszewski, E. Salzer, J.J. Seth, A.C. Simon, J.D. Spekkens, K. Stark, D.P. Strader, J. Tollerud, E.J. Toloba, E. Willman, B. Physics & Astronomy Department Texas Tech University Box 41051 LubbockTX79409-1051 United States Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States Department of Astronomy/Steward Observatory The University of Arizona 933 North Cherry Avenue Rm. N204 TucsonAZ85721-0065 United States University of Tampa Department of Chemistry Biochemistry and Physics 401 West Kennedy Boulevard TampaFL33606 United States University of California Berkeley Department of Astronomy 501 Campbell Hall # 3411 BerkeleyCA94720-3411 United States Harvard-Smithsonian Center for Astrophysics 60 Garden Street CambridgeMA02138 United States UCO/Lick Observatory University of California Santa Cruz 1156 High Street Santa CruzCA95064 United States Space Telescope Science Institute 3800 San Martin Drive BaltimoreMD21208 United States Department of Physics Engineering Physics and Astronomy Queen’s University KingstonONK7L 3N6 Canada Kavli Institute for Cosmological Physics University of Chicago ChicagoIL60637 United States Department of Astronomy and Astrophysics University of Chicago ChicagoIL60637 United States Department of Astronomy Indiana University 727 East Third Street BloomingtonIN47405 United States Department of Physics and Astronomy University of Utah 115 South 1400 East Salt Lake CityUT84112 United States Observatories of the Carnegie Institution for Science PasadenaCA91101 United States Department of Physics and Space Science Royal Military College of Canada P.O. Box 17000 Station Forces KingstonONK7K 7B4 Canada Center for Data Intensive and Time Domain Astronomy Department of Physics and Astronomy Michigan State University East LansingMI48824 United States Department of Physics University of the Pacific 3601 Pacific Avenue StocktonCA95211 United States LSST and Steward Observatory 933 North Cherry Avenue TucsonAZ85721 United States

We present observations of the dwarf galaxies GALFA Dw3 and GALFA Dw4 with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope (HST). These galaxies were initially discovered as optical counterparts to compact HI clouds in the GALFA survey. Both objects resolve into stellar populations which display an old red giant branch, younger helium burning, and massive main sequence stars. We use the tip of the red giant branch method to determine the distance to each galaxy, finding distances of 7.61+0−0..2829 Mpc and 3.10+0−0..1617 Mpc, respectively. With these distances we show that both galaxies are extremely isolated, with no other confirmed objects within ∼1.5 Mpc of either dwarf. GALFA Dw4 is also found to be unusually compact for a galaxy of its luminosity. GALFA Dw3 & Dw4 contain HII regions with young star clusters and an overall irregular morphology;they show evidence of ongoing star formation through both ultraviolet and Hα observations and are therefore classified as dwarf irregulars (dIrrs). The star formation histories of these two dwarfs show distinct differences: Dw3 shows signs of a recently ceased episode of active star formation across the entire dwarf, while Dw4 shows some evidence for current star formation in spatially limited HII regions. Compact HI sources offer a promising method for identifying isolated field dwarfs in the Local Volume, including GALFA Dw3 & Dw4, with the potential to shed light on the driving mechanisms of dwarf galaxy formation and evolution. © 2021, CC BY.

关键词： Galaxies

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Author Correction: The lactate receptor HCAR1 drives the recruitment of immunosuppressive PMN-MDSCs in colorectal cancer

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Nature immunology 2025年第4期26卷 635页

作者： Jiacheng He Xiaolei Chai Qiansen Zhang Yang Wang Yijie Wang Xinyu Yang Jingbo Wu Bo Feng Jing Sun Weiwei Rui Shuyin Ze Yuanyuan Fu Yumiao Zhao Ying Zhang Yao Zhang Meizhen Liu Chuang Liu Meifu She Xiangfei Hu Xueyun Ma Huaiyu Yang Dawei Li Senlin Zhao Guichao Li Zhen Zhang Zhonghui Tian Yanlin Ma Lingyan Cao Bo Yi Dali Li Ruth Nussinov Charis Eng Timothy A Chan Eytan Ruppin J Silvio Gutkind Feixiong Cheng Mingyao Liu Weiqiang Lu Shanghai Key Laboratory of Regulatory Biology Institute of Biomedical Sciences and School of Life Sciences East China Normal University Shanghai China. Department of Urology and Department of Pathology The Fifth People's Hospital of Shanghai Fudan University Shanghai China. Department of General Surgery and Department of Pathology Ruijin Hospital Shanghai Jiaotong University School of Medicine Shanghai China. Research Center for Complexity Sciences Hangzhou Normal University Hangzhou China. Department of Colorectal Surgery Department of Radiation Oncology Fudan University Shanghai Cancer Center Shanghai China. School of Life Sciences Fudan University Shanghai China. Hainan Provincial Key Laboratory for Human Reproductive Medicine and Genetic Research Hainan Provincial Clinical Research Center for Thalassemia Department of Reproductive Medicine Key Laboratory of Reproductive Health Diseases Research and Translation (Hainan Medical University) Ministry of Education The First Affiliated Hospital of Hainan Medical University Haikou China. Shanghai Ninth People's Hospital Shanghai Jiao Tong University School of Medicine College of Stomatology Shanghai Jiao Tong University Shanghai China. Department of Gastrointestinal Surgery The Third Xiangya Hospital Central South University Changsha China. Computational Structural Biology Section Basic Science Program Frederick National Laboratory for Cancer Research National Cancer Institute at Frederick Frederick MD USA. Department of Human Molecular Genetics and Biochemistry Sackler School of Medicine Tel Aviv University Tel Aviv Israel. Genomic Medicine Institute Lerner Research Institute Cleveland Clinic Cleveland OH USA. Department of Molecular Medicine Cleveland Clinic Lerner College of Medicine Case Western Reserve University Cleveland OH USA. Case Comprehensive Cancer Center Case Western Reserve University School of Medicine Cleveland OH USA. Center for Immunotherapy and Precision Immuno-Oncology Cleveland Clini

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The Prime Focus Spectrograph Galaxy Evolution Survey

arXiv

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arXiv 2022年

作者： Greene, Jenny E. Bezanson, Rachel Ouchi, Masami Silverman, John Arnouts, Stéphane Goulding, Andy D. Gu, Meng Gunn, James E. Harikane, Yuichi Heckman, Timothy Horowitz, Benjamin Johnson, Sean D. Kashino, Daichi Lee, Khee-Gan Leja, Joel Lin, Yen-Ting Marchesini, Danilo Matsuoka, Yoshiki Nagamine, Kentaro Ono, Yoshiaki Pearl, Alan Shibuya, Takatoshi Strauss, Michael A. Strom, Allison L. Sugahara, Yuma Tresse, Laurence Yabe, Kiyoto Yamashita, Takuji Akiyama, Masayuki Ata, Metin Azevedo, Gabriel M. Chen, Chian-Chou Chies-Santos, Ana L. Ellis, Richard S. Hahn, Changhoon Roier, Gabriel Roberto Hauschild Ichikawa, Kohei Ito, Kei Jiang, Linhua Jing, Y.P. Kawamuro, Taiki Kobayashi, Chiaki Kraljic, Katarina Le Brun, Vincent Liu, Xin Melchior, Peter Mendes De Oliveira, Claudia L. Monteiro-Oliveira, Rogério Nagao, Tohru Onodera, Masato Overzier, Roderik A. Schiminovich, David Schramm, Malte Shimakawa, Rhythm Sodré, Laerte Storchi-Bergmann, Thaisa Suzuki, Tomoko L. Tanaka, Masayuki Toba, Yoshiki Umehata, Hideki Wang, Jiaqi Welker, Charlotte Whitaker, Katherine Xu, Kun Xue, Yongquan Yang, Xiaohu Zu, Ying Department of Astrophysical Sciences Princeton University Princeton NJ08544 United States Department of Physics and Astronomy University of Pittsburgh PittsburghPA15260 United States Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8583 Japan Department of Astronomy School of Science The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-0033 Japan Aix Marseille University CNRS CNES LAM Marseille France Johns Hopkins University United States University of Michigan United States Institute for Advanced Research Nagoya University Nagoya464-8601 Japan Division of Particle and Astrophysical Science Graduate School of Science Nagoya University Nagoya464-8602 Japan Department of Astronomy & Astrophysics The Pennsylvania State University University ParkPA16802 United States Institute for Computational & Data Sciences The Pennsylvania State University University ParkPA United States Institute for Gravitation and the Cosmos The Pennsylvania State University University ParkPA16802 United States Institute of Astronomy and Astrophysics Academia Sinica Taiwan Tufts University United States Research Center for Space and Cosmic Evolution Ehime University Japan Theoretical Astrophysics Department of Earth & Space Science Graduate School of Science Osaka University 1-1 Machikaneyama Osaka Toyonaka560-0043 Japan Department of Physics & Astronomy University of Nevada Las Vegas 4505 S. Maryland Pkwy Las VegasNV89154-4002 United States Kitami Institute of Technology 165 Koen-cho Hokkaido Kitami090-8507 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Waseda Research Institute for Science and Engineering Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo169-8555 Japan Astronomical Institute Tohoku University Japan Av. Bento Gonçalves RS Porto Alegre9500

We present the Prime Focus Spectrograph (PFS) Galaxy Evolution pillar of the 360-night PFS Subaru Strategic Program. This 130-night program will capitalize on the wide wavelength coverage and massive multiplexing capabilities of PFS to study the evolution of typical galaxies from cosmic dawn to the present. From Lyman α emitters at z ∼ 7 to probe reionization, drop-outs at z ∼ 3 to map the inter-galactic medium in absorption, and a continuum-selected sample at z ∼ 1.5, we will chart the physics of galaxy evolution within the evolving cosmic web. This article is dedicated to the memory of Olivier Le Fevre, who was an early advocate for the construction of PFS, and a key early member of the Galaxy Evolution Working Group. © 2022, CC BY.

关键词： Spectrographs

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The overlapping burden of the three leading causes of disability and death in sub-Saharan African children

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Nature Communications 2022年第1期13卷 1-14页

作者： Reiner, Robert C. Welgan, Catherine A. Troeger, Christopher E. Baumann, Mathew M. Weiss, Daniel J. Deshpande, Aniruddha Blacker, Brigette F. Miller-Petrie, Molly K. Earl, Lucas Bhatt, Samir Abolhassani, Hassan Abosetugn, Akine Eshete Abu-Gharbieh, Eman Adekanmbi, Victor Adetokunboh, Olatunji O. Aghaali, Mohammad Aji, Budi Alahdab, Fares Al-Aly, Ziyad Alhassan, Robert Kaba Ali, Saqib Alizade, Hesam Aljunid, Syed Mohamed Almasi-Hashiani, Amir Al-Mekhlafi, Hesham M. Altirkawi, Khalid A. Alvis-Guzman, Nelson Amare, Azmeraw T. Amini, Saeed Amugsi, Dickson A. Ancuceanu, Robert Andrei, Catalina Liliana Ansari, Fereshteh Anvari, Davood Appiah, Seth Christopher Yaw Arabloo, Jalal Aremu, Olatunde Atout, Maha Moh’d Wahbi Ausloos, Marcel Ausloos, Floriane Ayanore, Martin Amogre Aynalem, Yared Asmare Azene, Zelalem Nigussie Badawi, Alaa Baig, Atif Amin Banach, Maciej Bedi, Neeraj Bhagavathula, Akshaya Srikanth Bhandari, Dinesh Bhardwaj, Nikha Bhardwaj, Pankaj Bhattacharyya, Krittika Bhutta, Zulfiqar A. Bijani, Ali Birhanu, Tesega Tesega Mengistu Bitew, Zebenay Workneh Boloor, Archith Brady, Oliver J. Butt, Zahid A. Car, Josip Carvalho, Felix Casey, Daniel C. Chattu, Vijay Kumar Chowdhury, Mohiuddin Ahsanul Kabir Chu, Dinh-Toi Coelho, Camila H. Cook, Aubrey J. Damiani, Giovanni Daoud, Farah Gela, Jiregna Darega Darwish, Amira Hamed Daryani, Ahmad Das, Jai K. Davis Weaver, Nicole Deribe, Kebede Desalew, Assefa Dharmaratne, Samath Dhamminda Dianatinasab, Mostafa Diaz, Daniel Djalalinia, Shirin Dorostkar, Fariba Dubljanin, Eleonora Duko, Bereket Dwyer-Lindgren, Laura Effiong, Andem El Sayed Zaki, Maysaa El Tantawi, Maha Enany, Shymaa Fattahi, Nazir Feigin, Valery L. Fernandes, Eduarda Ferrara, Pietro Fischer, Florian Foigt, Nataliya A. Folayan, Morenike Oluwatoyin Foroutan, Masoud Frostad, Joseph Jon Fukumoto, Takeshi Gaidhane, Abhay Motiramji Gebrekrstos, Hailemikael Gebrekidan G. K. Gebremeskel, Leake Gebreslassie, Assefa Ayalew Gething, Peter W. Gezae, Kebede Embaye Ghadiri, Keyghobad Ghashghaee, Ahmad Golechha, Mahaveer Gubar Institute for Health Metrics and Evaluation University of Washington Seattle WA United States Department of Health Metrics Sciences School of Medicine University of Washington Seattle WA United States Malaria Atlas Project University of Oxford Oxford United Kingdom Imperial College London London United Kingdom Department of Laboratory Medicine Karolinska University Hospital Huddinge Sweden Research Center for Immunodeficiencies Tehran University of Medical Sciences Tehran Iran Department of Public Health Debre Berhan University Debre Berhan Ethiopia Department of Clinical Sciences University of Sharjah Sharjah United Arab Emirates Population Health Sciences King’s College London London United Kingdom Centre of Excellence for Epidemiological Modelling and Analysis Stellenbosch University Stellenbosch South Africa Department of Global Health Stellenbosch University Cape Town South Africa Department of Epidemiology and Biostatistics Qom University of Medical Sciences Qom Iran Faculty of Medicine and Public Health Jenderal Soedirman University Purwokerto Indonesia Mayo Evidence-based Practice Center Mayo Clinic Foundation for Medical Education and Research Rochester MN United States John T. Milliken Department of Internal Medicine Washington University in St. Louis St. Louis MO United States Clinical Epidemiology Center Department of Veterans Affairs St Louis MO United States Institute of Health Research University of Health and Allied Sciences Ho Ghana Department of Information Systems College of Economics and Political Science Sultan Qaboos University Muscat Oman Infectious and Tropical Disease Research Center Hormozgan University of Medical Sciences Bandar Abbas Iran Department of Health Policy and Management Kuwait University Safat Kuwait International Centre for Casemix and Clinical Coding National University of Malaysia Bandar Tun Razak Malaysia Department of Epidemiology Arak University of Medical Sciences Arak Iran Medical Research Center

Despite substantial declines since 2000, lower respiratory infections (LRIs), diarrhoeal diseases, and malaria remain among the leading causes of nonfatal and fatal disease burden for children under 5 years of age (under 5), primarily in sub-Saharan Africa (SSA). The spatial burden of each of these diseases has been estimated subnationally across SSA, yet no prior analyses have examined the pattern of their combined burden. Here we synthesise subnational estimates of the burden of LRIs, diarrhoea, and malaria in children under-5 from 2000 to 2017 for 43 sub-Saharan countries. Some units faced a relatively equal burden from each of the three diseases, while others had one or two dominant sources of unit-level burden, with no consistent pattern geographically across the entire subcontinent. Using a subnational counterfactual analysis, we show that nearly 300 million DALYs could have been averted since 2000 by raising all units to their national average. Our findings are directly relevant for decision-makers in determining which and targeting where the most appropriate interventions are for increasing child survival. © 2022, The Author(s).

关键词： Biogeography Epidemiology Infectious diseases Malaria

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Young, blue, and isolated stellar systems in the Virgo Cluster I. 2-D Optical spectroscopy

arXiv

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arXiv 2022年

作者： Bellazzini, Michele Magrini, Laura Jones, Michael G. Sand, David J. Beccari, Giacomo Cresci, Giovanni Spekkens, Kristine Karunakaran, Ananthan Adams, Elizabeth A.K. Zaritsky, Dennis Battaglia, Giuseppina Seth, Anil Cannon, John M. Fuson, Jackson Inoue, John L. Mutlu-Pakdil, Burçin Guhathakurta, Puragra Muñoz, Ricardo R. Bennet, Paul Crnojević, Denija Caldwell, Nelson Strader, Jay Toloba, Elisa INAF Osservatorio di Astrofisica e Scienza Dello Spazio di Bologna Via Gobetti 93/3 Bologna40129 Italy INAF-Osservatorio Astrofisico di Arcetri Largo E. Fermi 5 Firenze50125 Italy Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States European Southern Observatory Karl-Schwarzschild-Straße 2 Garching bei MünchenD-85748 Germany Department of Physics and Space Science Royal Military College of Canada P.O. Box 17000 Station Forces Kingston ONK7K 7B4 Canada Department of Physics Engineering Physics and Astronomy Queens University KingstonONK7L 3N6 Canada Glorieta de la Astronomía Granada18008 Spain Department of Physics Engineering Physics and Astronomy Queens University KingstonONK7L 3N6 Canada ASTRON Netherlands Institute for Radio Astronomy Oude Hoogeveensedijk 4 Dwingeloo7991 PD Netherlands Kapteyn Astronomical Institute University of Groningen PO Box 800 Groningen9700 AV Netherlands Instituto de Astrofísica de Canarias Vía Láctea s/n La Laguna38205 Spain Department of Astrophysics University of la Laguna San Cristóbal de La LagunaE-38206 Spain Department of Physics & Astronomy University of Utah Salt Lake CityUT84112 United States Department of Physics & Astronomy Macalester College 1600 Grand Avenue Saint PaulMN55105 United States Kavli Institute for Cosmological Physics University of Chicago ChicagoIL60637 United States Department of Astronomy and Astrophysics University of Chicago ChicagoIL60637 United States UCO/Lick Observatory University of California Santa Cruz 1156 High Street Santa CruzCA95064 United States Departamento de Astronomía Universidad de Chile Camino El Observatorio 1515 Las Condes Santiago Chile Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States University of Tampa 401 West Kennedy Boulevard TampaFL33606 United States Center for Astrophysics Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United State

We use panoramic optical spectroscopy obtained with MUSE@VLT to investigate the nature of five candidate extremely isolated low-mass star forming regions (Blue Candidates, BCs hereafter) toward the Virgo cluster of galaxies. Four of the five (BC1, BC3, BC4, BC5) are found to host several Hii regions and to have radial velocities fully compatible with being part of the Virgo cluster. All the confirmed candidates have mean metallicity significantly in excess of that expected from their stellar mass, indicating that they originated from gas stripped from larger galaxies. In summary, these four candidates share the properties of the prototype system SECCO 1, suggesting the possible emergence of a new class of stellar systems, intimately linked to the complex duty cycle of gas within clusters of galaxies. A thorough discussion on the nature and evolution of these objects is presented in a companion paper, where the results obtained here from MUSE data are complemented with Hubble Space Telescope (optical) and Very Large Array (Hi) observations. Copyright © 2022, The Authors. All rights reserved.

关键词： Galaxies

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Modeling temporal networks with bursty activity patterns of nodes and links

arXiv

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arXiv 2019年

作者： Hiraoka, Takayuki Masuda, Naoki Li, Aming Jo, Hang-Hyun Asia Pacific Center for Theoretical Physics Pohang37673 Korea Republic of Department of Mathematics University at Buffalo State University of New York BuffaloNY14260-2900 United States Computational and Data-Enabled Science and Engineering Program University at Buffalo State University of New York BuffaloNY14260-5030 United States Department of Zoology University of Oxford OxfordOX1 3PS United Kingdom Department of Biochemistry University of Oxford OxfordOX1 3QU United Kingdom Department of Physics Pohang University of Science and Technology Pohang37673 Korea Republic of Department of Computer Science Aalto University EspooFI-00076 Finland

The concept of temporal networks provides a framework to understand how the interaction between system components changes over time. In empirical communication data, we often detect non-Poissonian, so-called bursty behavior in the activity of nodes as well as in the interaction between nodes. However, such reconciliation between node burstiness and link burstiness cannot be explained if the interaction processes on different links are independent of each other. This is because the activity of a node is the superposition of the interaction processes on the links incident to the node and the superposition of independent bursty point processes is not bursty in general. Here we introduce a temporal network model based on bursty node activation and show that it leads to heavy-tailed inter-event time distributions for both node dynamics and link dynamics. Our analysis indicates that activation processes intrinsic to nodes give rise to dynamical correlations across links. Our framework offers a way to model competition and correlation between links, which is key to understanding dynamical processes in various systems. Copyright © 2019, The Authors. All rights reserved.

关键词： Chemical activation

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Mass determination of two Jupiter-sized planets orbiting slightly evolved stars: TOI-2420 b and TOI-2485 b

arXiv

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arXiv 2024年

作者： Carleo, Ilaria Barragan, Oscar Persson, Carina M. Fridlund, Malcolm Lam, Kristine W.F. Messina, Sergio Gandolfi, Davide Smith, Alexis M.S. Johnson, Marshall C. Cochran, William Osborne, Hannah L.M. Brahm, Rafael Ciardi, David R. Collins, Karen A. Everett, Mark E. Giacalone, Steven Guenther, Eike W. Hatzes, Artie Hellier, Coel Horner, Jonathan Kabath, Petr Korth, Judith MacQueen, Phillip Masseron, Thomas Murgas, Felipe Nowak, Grzegorz Rodriguez, Joseph E. Watkins, Cristilyn N. Wittenmyer, Rob Zhou, George Ziegler, Carl Bieryla, Allyson Boyd, Patricia T. Clark, Catherine A. Dressing, Courtney D. Eastman, Jason D. Eberhardt, Jan Endl, Michael Espinoza, Nestor Fausnaugh, Michael Guerrero, Natalia M. Henning, Thomas Hesse, Katharine Hobson, Melissa J. Howell, Steve B. Jordan, Andres Latham, David W. Lund, Michael B. Mireles, Ismael Narita, Norio Pinto, Marcelo Tala Pugh, Teznie Quinn, Samuel N. Ricker, George Rodriguez, David R. Rojas, Felipe I. Rose, Mark E. Rudat, Alexander Sarkis, Paula Savel, Arjun B. Schlecker, Martin Schwarz, Richard P. Seager, Sara Shporer, Avi Smith, Jeffrey C. Stassun, Keivan G. Stockdale, Chris Trifonov, Trifon Vanderspek, Roland Winn, Joshua N. Wright, Duncan INAF-Osservatorio Astrofisico di Torino Via Osservatorio 20 Pino TorineseI-10025 Italy Tenerife La Laguna38205 Spain Tenerife La LagunaE-38206 Spain Sub-department of Astrophysics Department of Physics University of Oxford OxfordOX1 3RH United Kingdom Chalmers University of Technology Department of Space Earth and Environment Onsala Space Observatory OnsalaSE-439 92 Sweden Leiden Observatory University of Leiden PO Box 9513 Leiden2300 RA Netherlands Rutherfordstrasse 2 Berlin12489 Germany INAF - Osservatorio Astrofisico di Catania Via S. Sofia 78 CataniaI-95123 Italy Dipartimento di Fisica Universita degli Studi di Torino via Pietro Giuria 1 TorinoI-10125 Italy Department of Astronomy The Ohio State University 4055 McPherson Laboratory 140 West 18th Avenue ColumbusOH43210 United States Mullard Space Science Laboratory University College London Holmbury St Mary Dorking SurreyRH5 6NT United Kingdom European Southern Observatory Karl-Schwarzschild-Strase 2 Garching bei MunchenD-85748 Germany Facultad de Ingeniera y Ciencias Universidad Adolfo Ibanez Av. Diagonallas Torres 2640 Penalolen Santiago Chile Millennium Institute for Astrophysics Chile NASA Exoplanet Science Institute-Caltech IPAC PasadenaCA91125 United States Center for Astrophysics | Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States Department of Astronomy and McDonald Observatory University of Texas at Austin 2515 Speedway Stop C1400 AustinTX78712 United States NSF National Optical-Infrared Astronomy Research Laboratory 950 N. Cherry Ave. TucsonAZ85719 United States Department of Astronomy California Institute of Technology PasadenaCA91125 United States Thuringer Landessternwarte Tautenburg Sternwarte 5 TautenburgD-07778 Germany Astrophysics Group Keele University StaffordshireST5 5BG United Kingdom Astronomical Institute Czech Academy of Sciences Fričova 298 Ondřejov25165 Czech Republic Lund Observatory Division of Astrophysics

Context. Hot and warm Jupiters might have undergone the same formation and evolution path, but the two populations exhibit different distributions of orbital parameters, challenging our understanding on their actual origin. Aims. The present work, which is the results of our warm Jupiters survey carried out with the CHIRON spectrograph within the KESPRINT collaboration, aims to address this challenge by studying two planets that could help bridge the gap between the two populations. *** report the confirmation and mass determination of a hot Jupiter (orbital period shorter than 10 days), TOI-2420 b, and a warm Jupiter, TOI-2485 b. We performed a joint analysis using a wide variety of spectral and photometric data in order to characterize these planetary systems. Results. We found that TOI-2420 b has an orbital period of Pb=5.8 days, a mass of Mb=0.9 MJ and a radius of Rb=1.3 RJ, with a planetary density of 0.477 g cm-3;while TOI-2485 b has an orbital period of Pb=11.2 days, a mass of Mb=2.4 MJ and a radius of Rb=1.1 RJ with density 2.36 g cm-3. Conclusions. With current parameters, the migration history for TOI-2420 b and TOI-2485 b is unclear: the high-eccentricity migration scenarios cannot be ruled out, and TOI-2485 b's characteristics may rather support this scenario. Copyright © 2024, The Authors. All rights reserved.

关键词： Planets

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AA-ICP: Iterative closest point with anderson acceleration

arXiv

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arXiv 2017年

作者： Pavlov, A.L. Ovchinnikov, G.V. Derbyshev, D.Yu. Tsetserukou, D. Oseledets, I.V. Space Center Skolkovo Institute of Science and Technology Skolkovo Innovation Center Moscow143026 Russia Center for Computational and Data-Intensive Science and Engineering Skolkovo Institute of Science and Technology Moscow Institute of Physics and Technology Space Center Skolkovo Institute of Science and Technology

Iterative Closest Point (ICP) is a widely used method for performing scan-matching and registration. Being simple and robust method, it is still computationally expensive and may be challenging to use in real-time applications with limited resources on mobile platforms. In this paper we propose novel effective method for acceleration of ICP which does not require substantial modifications to the existing code. This method is based on an idea of Anderson acceleration which is an iterative procedure for finding a fixed point of contractive mapping. The latter is often faster than a standard Picard iteration, usually used in ICP implementations. We show that ICP, being a fixed point problem, can be significantly accelerated by this method enhanced by heuristics to improve overall robustness. We implement proposed approach into Point Cloud Library (PCL) and make it available online. Benchmarking on real-world data fully supports our claims. Copyright © 2017, The Authors. All rights reserved.

关键词： Heuristic methods

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Rapid simulation of glycoprotein structures by grafting and steric exclusion of glycan conformer libraries

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Cell 2024年第5期187卷 1296-1311.e26页

作者： Yu-Xi Tsai Ning-En Chang Klaus Reuter Hao-Ting Chang Tzu-Jing Yang Sören von Bülow Vidhi Sehrawat Noémie Zerrouki Matthieu Tuffery Michael Gecht Isabell Louise Grothaus Lucio Colombi Ciacchi Yong-Sheng Wang Min-Feng Hsu Kay-Hooi Khoo Gerhard Hummer Shang-Te Danny Hsu Cyril Hanus Mateusz Sikora Institute of Biological Chemistry Academia Sinica Taipei 11529 Taiwan Institute of Biochemical Sciences National Taiwan University Taipei 10617 Taiwan. Max Planck Computing and Data Facility 85748 Garching Germany. Department of Theoretical Biophysics Max Planck Institute for Biophysics 60438 Frankfurt Germany. Department of Theoretical Biophysics Max Planck Institute for Biophysics 60438 Frankfurt Germany Malopolska Centre of Biotechnology Jagiellonian University 31-007 Kraków Poland. Institute of Psychiatry and Neurosciences of Paris Inserm UMR1266 Université Paris-Cité 75014 Paris France. Hybrid Materials Interfaces Group Faculty of Production Engineering Bremen Center for Computational Materials Science and MAPEX Center for Materials and Processes University of Bremen 28359 Bremen Germany. Institute of Biological Chemistry Academia Sinica Taipei 11529 Taiwan. Institute of Biophysics Goethe University 60438 Frankfurt Germany. Institute of Biochemical Sciences National Taiwan University Taipei 10617 Taiwan International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM(2)) Hiroshima University Hiroshima 739-8526 Japan. Electronic address: sthsu@gate.sinica.edu.tw. Institute of Psychiatry and Neurosciences of Paris Inserm UMR1266 Université Paris-Cité 75014 Paris France GHU Psychiatrie et Neurosciences de Paris 75014 Paris France. Electronic address: cyril.hanus@inserm.fr. Malopolska Centre of Biotechnology Jagiellonian University 31-007 Kraków Poland. Electronic address: mateusz.sikora@uj.edu.pl.

Most membrane proteins are modified by covalent addition of complex sugars through N- and O-glycosylation. Unlike proteins, glycans do not typically adopt specific secondary structures and remain very mobile, shielding potentially large fractions of protein surface. High glycan conformational freedom hinders complete structural elucidation of glycoproteins. Computer simulations may be used to model glycosylated proteins but require hundreds of thousands of computing hours on supercomputers, thus limiting routine use. Here, we describe GlycoSHIELD, a reductionist method that can be implemented on personal computers to graft realistic ensembles of glycan conformers onto static protein structures in minutes. Using molecular dynamics simulation, small-angle X-ray scattering, cryoelectron microscopy, and mass spectrometry, we show that this open-access toolkit provides enhanced models of glycoprotein structures. Focusing on N-cadherin, human coronavirus spike proteins, and gamma-aminobutyric acid receptors, we show that GlycoSHIELD can shed light on the impact of glycans on the conformation and activity of complex glycoproteins.

关键词： GABAA receptor N-cadherin SAXS coronavirus S protein cryo-EM glycans glycoproteins mass spectrometry molecular dynamics

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The UNCOVER Survey: A first-look HST+JWST catalog of 60, 000 galaxies near Abell 2744 and beyond

arXiv

引用

arXiv 2023年

作者： Weaver, John R. Cutler, Sam E. Pan, Richard Whitaker, Katherine E. Labbé, Ivo Price, Sedona H. Bezanson, Rachel Brammer, Gabriel Marchesini, Danilo Leja, Joel Wang, Bingjie Furtak, Lukas J. Zitrin, Adi Atek, Hakim Chemerynska, Iryna Coe, Dan Dayal, Pratika van Dokkum, Pieter Feldmann, Robert Förster Schreiber, Natascha M. Franx, Marijn Fujimoto, Seiji Fudamoto, Yoshinobu Glazebrook, Karl de Graaff, Anna Greene, Jenny E. Juneau, Stéphanie Kassin, Susan Kriek, Mariska Khullar, Gourav Maseda, Michael V. Mowla, Lamiya A. Muzzin, Adam Nanayakkara, Themiya Nelson, Erica J. Oesch, Pascal A. Pacifici, Camilla Papovich, Casey Setton, David J. Shapley, Alice E. Shipley, Heath V. Smit, Renske Stefanon, Mauro Taylor, Edward N. Weibel, Andrea Williams, Christina C. Department of Astronomy University of Massachusetts AmherstMA01003 United States Department of Physics and Astronomy Tufts University 574 Boston Ave. MedfordMA02155 United States Denmark Centre for Astrophysics and Supercomputing Swinburne University of Technology MelbourneVIC3122 Australia Department of Physics and Astronomy PITT PACC University of Pittsburgh PittsburghPA15260 United States Niels Bohr Institute University of Copenhagen Jagtvej 128 København NDK-2200 Denmark 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 Department Ben-Gurion University of the Negev P.O. Box 653 Beer-Sheva8410501 Israel Institut d’Astrophysique de Paris CNRS Sorbonne Université 98bis Boulevard Arago Paris75014 France 3700 San Martin Drive BaltimoreMD21218 United States United States Center for Astrophysical Sciences Department of Physics and Astronomy The Johns Hopkins University 3400 N Charles St. BaltimoreMD21218 United States Kapteyn Astronomical Institute University of Groningen P.O. Box 800 Groningen9700 AV Netherlands Department of Astronomy Yale University New HavenCT06511 United States Institute for Computational Science University of Zurich Winterhurerstrasse 190 ZurichCH-8057 Switzerland Max-Planck-Institut für extraterrestrische Physik Gießenbachstraße 1 Garching85748 Germany Leiden Observatory Leiden University P.O.Box 9513 LeidenNL-2300 AA Netherlands Department of Astronomy The University of Texas at Austin AustinTX78712 United States 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 Jap

In November 2022, the James Webb Space Telescope (JWST) returned deep near-infrared images of Abell 2744 – a powerful lensing cluster capable of magnifying distant, incipient galaxies beyond it. Together with the existing Hubble Space Telescope (HST) imaging, this publicly available dataset opens a fundamentally new discovery space to understand the remaining mysteries of the formation and evolution of galaxies across cosmic time. In this work, we detect and measure some 60 000 objects across the 49 arcmin2 JWST footprint down to a 5 σ limiting magnitude of ∼30 mag in 0.32′′ apertures. Photometry is performed using circular apertures on images matched to the point spread function of the reddest NIRCam broad band, F444W, and cleaned of bright cluster galaxies and the related intracluster light. To give an impression of the photometric performance, we measure photometric redshifts and achieve a σNMAD ≈ 0.03 based on known, but relatively small, spectroscopic samples. With this paper, we publicly release our HST and JWST PSF-matched photometric catalog with optimally assigned aperture sizes for easy use, along with single aperture catalogs, photometric redshifts, rest-frame colors, and individual magnification estimates. These catalogs will set the stage for efficient and deep spectroscopic follow-up of some of the first JWST-selected samples in Summer 2023. © 2023, CC BY.

关键词： Photometry

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