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Nanomedicine: Nanotechnology, Biology and Medicine 2025年 68卷

作者： Arshad Islam Simone Rodrigues Silva Erica Coelho Duarte Priscila I.S. de Tótaro Dalton Dittz Luiz Alberto Colnago Fernando F. Paiva Miriam Tereza Paz Lopes Eduardo M.A.M. Mendes Fakhra Riaz Frederic Frézard Cynthia Demicheli Department of Physiology and Biophysics Postgraduate Program in Physiology and Pharmacology Institute of Biological Sciences Universidade Federal de Minas Gerais Belo Horizonte 31270-901 Minas Gerais Brazil Department of Chemistry Institute of Exact Sciences Universidade Federal de Minas Gerais Belo Horizonte 31270-901 Minas Gerais Brazil Department of Chemistry Science and Technology Center Federal University of Roraima Av. Cap. Ene Garcês Boa Vista RR 69310-000 Brazil Department of Biochemistry and Pharmacology Health Sciences Center Federal University of Piauí Teresina PI 64049-550 Brazil Embrapa Instrumentation Brazilian Agricultural Research Corporation Parque Estação Biológica - PqEB s/n Brasília 70770-901 DF Brazil São Carlos Institute of Physics University of São Paulo São Carlos 13563-120 SP Brazil Department of Pharmacology Institute of Biological Sciences Federal University of Minas Gerais Belo Horizonte 31270-901 Minas Gerais Brazil Centre for Technology and Research in Magnetic-Resonance Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte 31270-901 Minas Gerais Brazil SA-Centre for Interdisciplinary Research in Basic Sciences International Islamic University Islamabad 44000 Pakistan

The Astrometric Animation of Water Masers towards the Mira Variable BX Cam

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arXiv 2022年

作者： Xu, Shuangjing Imai, Hiroshi Yun, Youngjoo Zhang, Bo Rioja, María J. Dodson, Richard Cho, Se-Hyung Kim, Jaeheon Cui, Lang Sobolev, Andrey M. Chibueze, James O. Kim, Dong-Jin Amada, Kei Nakashima, Jun-Ichi Orosz, Gabor Oyadomari, Miyako Oh, Sejin Yonekura, Yoshinori Sun, Yan Mai, Xiaofeng Zhang, Jingdong Wen, Shiming Jung, Taehyun Korea Astronomy and Space Science Institute 776 Daedeok-daero Yuseong-gu Daejeon34055 Korea Republic of Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Graduate School of Science and Engineering Kagoshima University 1-21-35 Korimoto Kagoshima890-0065 Japan Amanogawa Galaxy Astronomy Research Center Graduate School of Science and Engineering Kagoshima University 1-21-35 Korimoto Kagoshima890-0065 Japan Center for General Education Institute for Comprehensive Education Kagoshima University 1-21-30 Korimoto Kagoshima890-0065 Japan ICRAR M468 The University of Western Australia 35 Stirling Hwy CrawleyWA6009 Australia CSIRO Astronomy and Space Science PO Box 1130 BentleyWA6102 Australia Alfonso XII 3 y 5 Madrid28014 Spain Astronomy program Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Republic of Korea Korea Astronomy and Space Science Institute Yuseonggu Daejeon34055 Korea Republic of Xinjiang Astronomical Observatory Chinese Academy of Sciences 150 Science 1-Street Urumqi830011 China Ural Federal University 19 Mira Street Ekaterinburg620002 Russia Centre for Space Research North-West University Potchefstroom2520 South Africa Department of Physics and Astronomy Faculty of Physical Sciences University of Nigeria Carver Building 1 University Road Nsukka Nigeria Massachusetts Institute of Technology Haystack Observatory 99 Millstone Road WestfordMA01886 United States Max-Planck-Institut für Radioastronomie Auf dem Hügel 69 BonnD-53121 Germany School of Physics and Astronomy Sun Yat-sen University 2 Daxue Road Tangjia Guangdong Province Zhuhai China Joint Institute for VLBI ERIC Oude Hoogeveensedijk 4 Dwingeloo7991PD Netherlands Center for Astronomy Ibaraki University 2-1-1 Bunkyo Ibaraki Mito310-8512 Japan Yuquan Rd. Shijingshan Beijing100049 China

We report VLBI monitoring observations of the 22 GHz water (H2O) masers around the Mira variable BX Cam, which were carried out as a part of the EAVN Synthesis of Stellar Maser Animations (ESTEMA) project. Data of 37 epochs in total were obtained from 2018 May to 2021 June with a time interval of 3–4 weeks, spanning approximately three stellar pulsation periods (P =∼440 d). In particular, the dual-beam system equipped on the VERA stations was used to measure the kinematics and parallaxes of the H2O maser features. The measured parallax, π = 1.79 ± 0.08 mas, is consistent with Gaia EDR3 and previously measured VLBI parallaxes within a 1-σ error level. The position of the central star was estimated, based on both the Gaia EDR3 data and the center position of the ring-like 43 GHz silicon-monoxide (SiO) maser distribution imaged with the KVN. The three-dimensional H2O maser kinematics indicates that the circumstellar envelope is expanding at a velocity of 13 ± 4 km s−1, while there are asymmetries in both the spatial and velocity distributions of the maser features. Furthermore, the H2O maser animation achieved by our dense monitoring program manifests the propagation of shock waves in the circumstellar envelope of BX Cam. © 2022, CC BY.

关键词： Stars

Detection of the 2021 Outburst of RS Ophiuchi with the LST-1

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arXiv 2023年

作者： Kobayashi, Yukiho Aguasca-Cabot, Arnau Martín, María Isabel Bernardos Green, David López-Coto, Rubén Abe, K. Abe, S. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, P. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, P. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Carrasco, M.S. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del Peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di Piano, A. Di Pierro, F. Di Pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, S. Fukami, S. Fukazawa, Y. Garcia, E. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht Paiva, J. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, S. Günther, P. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. Le Flour, T. Linhoff, M. Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwa-no-ha Chiba Kashiwa277-8582 Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Martí i Franquès 1 Barcelona08028 Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain Max-Planck-Institut für Physik Föhringer Ring 6 München80805 Germany Department of Physics Tokai University Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Spain Instituto de Astrofísica de Andalucía-CSIC Spain EMFTEL department IPARCOS Universidad Complutense de Madrid Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Max-Planck-Institut für Physik Germany INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Spain LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS-IN2P3 Annecy France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF - Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de Physique Nucléaire et Corpusculaire Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science United States University of Alcalá UAH Spa

Novae are luminous explosions in close binaries which host a white dwarf and a companion donor star. They are triggered by a thermonuclear runaway when the white dwarf accretes a critical amount of matter from the secondary. Though novae are established as high-energy gamma-ray emitters through observations by the Fermi Large Area Telescope (LAT), the origin of the gamma-ray emission, whether it is hadronic or leptonic, had been under intense debate until very recently. RS Ophiuchi (RS Oph) is a well-known recurrent symbiotic nova with a recurrence time scale of 15 years. The most recent outburst of RS Oph in 2021 brought the first detection of very-high-energy (VHE) gamma rays from a nova ever. The first Large-Sized Telescope prototype (LST-1) of the Cherenkov Telescope Array observed this historic event along with H.E.S.S. and MAGIC. The LST-1 observations in the first days after the burst onset show a clear VHE gamma-ray signal from RS Oph. The low energy threshold of LST-1 allows us to reconstruct the RS Oph gamma-ray spectrum down to ∼30 GeV, providing the best connection of the VHE gamma-ray data to the Fermi LAT energy range. The results from the analysis of the LST-1 observations are consistent with those obtained with H.E.S.S. and MAGIC, and also support a hadronic origin for the observed gamma-ray fluxes. In this contribution, we will present the analysis results of the LST-1 observations of the 2021 outburst of RS Oph. © 2023, CC BY.

关键词： Telescopes

Revealing the Emergence of Classicality Using Nitrogen-Vacancy Centers

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physical Review Letters 2019年第14期123卷 140402-140402页

作者： T. K. Unden D. Louzon M. Zwolak W. H. Zurek F. Jelezko Institute for Quantum Optics Ulm University Albert-Einstein-Allee 11 Ulm 89081 Germany Racah Institute of Physics The Hebrew University of Jerusalem Jerusalem 91904 Israel Biophysics Group Microsystems and Nanotechnology Division Physical Measurement Laboratory National Institute of Standards and Technology Gaithersburg Maryland 20899 USA Theory Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Center for Integrated Quantum Science and Technology (IQst) Ulm University Ulm 89081 Germany

The origin of classical reality in our quantum world is a long-standing mystery. Here, we examine a nitrogen-vacancy center in diamond evolving in the presence of its magnetic nuclear spin environment which is formed by the natural appearance of carbon C13 atoms in the diamond lattice, to study quantum Darwinism—the proliferation of information about preferred quantum states throughout the world via the environment. This redundantly imprinted information accounts for the perception of objective reality, as it is independently accessible by many without perturbing the system of interest. To observe this process, we implement a novel dynamical decoupling scheme that enables the measurement and control of several nuclear spins (the environment E) interacting with a nitrogen vacancy (the system S). Our experiment demonstrates that, in the course of the decoherence of S, redundant information is indeed imprinted onto E, giving rise to incipient classical objectivity—a consensus recorded in redundant copies, and available from the fragments of the nuclear spin environment E, about the state of S. This provides the first laboratory verification of the process responsible for the emergence of the objective classical world from the underlying quantum substrate.

关键词： Open quantum systems & decoherence Quantum correlations in quantum information Quantum foundations Quantum measurements Quantum sensing Quantum-to-classical transition Nitrogen vacancy centers in diamond

Precessing jet nozzle connecting to a spinning black hole in M87

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arXiv 2023年

作者： Cui, Yuzhu Hada, Kazuhiro Kawashima, Tomohisa Kino, Motoki Lin, Weikang Mizuno, Yosuke Ro, Hyunwook Honma, Mareki Yi, Kunwoo Yu, Jintao Park, Jongho Jiang, Wu Shen, Zhiqiang Kravchenko, Evgeniya Algaba, Juan-Carlos Cheng, Xiaopeng Cho, Ilje Giovannini, Gabriele Giroletti, Marcello Jung, Taehyun Lu, Ru-Sen Niinuma, Kotaro Oh, Junghwan Ohsuga, Ken Sawada-Satoh, Satoko Sohn, Bong Won Takahashi, Hiroyuki R. Takamura, Mieko Tazaki, Fumie Trippe, Sascha Wajima, Kiyoaki Akiyama, Kazunori An, Tao Asada, Keiichi Buttaccio, Salvatore Byun, Do-Young Cui, Lang Hagiwara, Yoshiaki Hirota, Tomoya Hodgson, Jeffrey Kawaguchi, Noriyuki Kim, Jae-Young Lee, Sang-Sung Lee, Jee Won Lee, Jeong Ae Maccaferri, Giuseppe Melis, Andrea Melnikov, Alexey Migoni, Carlo Oh, Se-Jin Sugiyama, Koichiro Wang, Xuezheng Zhang, Yingkang Chen, Zhong Hwang, Ju-Yeon Jung, Dong-Kyu Kim, Hyo-Ryoung Kim, Jeong-Sook Kobayashi, Hideyuki Li, Bin Li, Guanghui Li, Xiaofei Liu, Zhiyong Liu, Qinghui Liu, Xiang Oh, Chung-Sik Oyama, Tomoaki Roh, Duk-Gyoo Wang, Jinqing Wang, Na Wang, Shiqiang Xia, Bo Yan, Hao Yeom, Jae-Hwan Yonekura, Yoshinori Yuan, Jianping Zhang, Hua Zhao, Rongbing Zhong, Weiye Research Center for Intelligent Computing Platforms Zhejiang Laboratory Hangzhou311100 China Tsung-Dao Lee Institute Shanghai Jiao Tong University 520 Shengrong Road Shanghai201210 China Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Mizusawa VLBI Observatory National Astronomical Observatory of Japan 2-12 Hoshigaoka Mizusawa Iwate Oshu023-0861 Japan Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan Kogakuin University of Technology & Engineering Academic Support Center 2665-1 Nakano-machi Hachioji Tokyo192-0015 Japan South-Western Institute For Astronomy Research Yunnan University Kunming650500 China School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Institut für Theoretische Physik Goethe-Universität Frankfurt Max-von-Laue-Straße 1 Frankfurt am MainD-60438 Germany Korea Astronomy & Space Science Institute Daedeokdae-ro 776 Yuseong-gu Daejeon34055 Korea Republic of Department of Astronomy Yonsei University Yonsei-ro 50 Seodaemun-gu Seoul03722 Korea Republic of Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan Department of Physics and Astronomy Seoul National University Gwanak-gu Seoul08826 Korea Republic of Department of Information Countermeasure Air Force Early Warning Academy Wuhan430019 China Institute of Astronomy and Astrophysics Academia Sinica HiloHI96720 United States Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Key Laboratory of Radio Astronomy Chinese Academy of Sciences Beijing100101 China Moscow Institute of Physics and Technology Dolgoprudny Institutsky per. 9 Moscow141700 Russia Lebedev Physical Institute The Russian Academy of Sciences Leninsky prospekt 53 Moscow119991 Russia Department of Physics Faculty of Science U

The nearby radio galaxy M87 offers a unique opportunity to explore the connections between the central supermassive black hole and relativistic jets. Previous studies of the inner region of M87 revealed a wide opening angle for the jet originating near the black hole 1–4. The Event Horizon Telescope resolved the central radio source and found an asymmetric ring structure consistent with expectations from General Relativity 5. With a baseline of 17 years of observations, there was a shift in the jet’s transverse position, possibly arising from an eight to ten-year quasi-periodicity 3. However, the origin of this sideways shift remains unclear. Here we report an analysis of radio observations over 22 years that suggests a period of about 11 years in the position angle variation of the jet. We infer that we are seeing a spinning black hole that induces the Lense-Thirring precession of a misaligned accretion disk. Similar jet precession may commonly occur in other active galactic nuclei but has been challenging to detect owing to the small magnitude and long period of the variation. Copyright © 2023, The Authors. All rights reserved.

关键词： Active Galactic Nuclei

Magnetoelastic distortion of multiferroic BiFeO3 in the canted antiferromagnetic state

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physical Review B 2020年第21期102卷 214410-214410页

作者： T. Rõõm J. Viirok L. Peedu U. Nagel D. G. Farkas D. Szaller V. Kocsis S. Bordács I. Kézsmárki D. L. Kamenskyi H. Engelkamp M. Ozerov D. Smirnov J. Krzystek K. Thirunavukkuarasu Y. Ozaki Y. Tomioka T. Ito T. Datta R. S. Fishman National Institute of Chemical Physics and Biophysics Akadeemia tee 23 12618 Tallinn Estonia Department of Physics Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group 1111 Budapest Hungary Condensed Matter Research Group of the Hungarian Academy of Sciences 1111 Budapest Hungary Institute of Solid State Physics Vienna University of Technology 1040 Vienna Austria RIKEN Center for Emergent Matter Science (CEMS) Wako 351-0198 Japan Hungarian Academy of Sciences Premium Postdoctor Program 1051 Budapest Hungary Experimental Physics V Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg 86159 Augsburg Germany High Field Magnet Laboratory (HFML-EMFL) Radboud University Toernooiveld 7 6525 ED Nijmegen Netherlands National High Magnetic Field Laboratory Tallahassee FloridA 32310 USA Department of Physics Florida A&M University Florida 32307 USA National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba 305-8565 Ibaraki Japan Department of Chemistry and Physics Augusta University 1120 15th Street Augusta Georgia 30912 USA Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37830 USA

Using THz spectroscopy, we show that the spin-wave spectrum of multiferroic BiFeO3 in its high-field canted antiferromagnetic state is well described by a spin model that violates rhombohedral symmetry. We demonstrate that the monoclinic distortion of the canted antiferromagnetic state is induced by the single-ion magnetoelastic coupling between the lattice and the two nearly antiparallel spins. The revised spin model for BiFeO3 contains two new single-ion anisotropy terms that violate rhombohedral symmetry and depend on the direction of the magnetic field.

关键词： Ferroelectricity Magnetic anisotropy Magnetic order Magnetoelastic effect Spin dynamics Spin waves Spin-orbit coupling Ferroelectrics Multiferroics Terahertz spectroscopy

Patterns of somatic structural variation in human cancer genomes (vol 578, pg 112, 2020)

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NATURE 2023年第7948期614卷 E38-E38页

作者： Li, Yilong Roberts, Nicola D. Wala, Jeremiah A. Shapira, Ofer Schumacher, Steven E. Kumar, Kiran Khurana, Ekta Waszak, Sebastian Korbel, Jan O. Haber, James E. Imielinski, Marcin Weischenfeldt, Joachim Beroukhim, Rameen Campbell, Peter J. Cancer Genome Project Wellcome Trust Sanger Institute Hinxton UK Totient Inc Cambridge MA USA Wellcome Sanger Institute Wellcome Genome Campus Hinxton UK Department of Haematology University of Cambridge Cambridge UK Cambridge University Hospitals NHS Foundation Trust Cambridge UK Korea Advanced Institute of Science and Technology Daejeon South Korea Department of Zoology Genetics and Physical Anthropology University of Santiago de Compostela Santiago de Compostela Spain Centre for Research in Molecular Medicine and Chronic Diseases (CIMUS) University of Santiago de Compostela Santiago de Compostela Spain The Biomedical Research Centre (CINBIO) University of Vigo Vigo Spain Centre for Research in Molecular Medicine and Chronic Diseases (CiMUS) Universidade de Santiago de Compostela Santiago de Compostela Spain Department of Zoology Genetics and Physical Anthropology (CiMUS) Universidade de Santiago de Compostela Santiago de Compostela Spain The Biomedical Research Centre (CINBIO) Universidade de Vigo Vigo Spain The Broad Institute of Harvard and MIT Cambridge MA USA Bioinformatics and Integrative Genomics Harvard University Cambridge MA USA Department of Cancer Biology Dana-Farber Cancer Institute Boston MA USA Broad Institute of MIT and Harvard Cambridge MA USA Department of Medical Oncology Dana-Farber Cancer Institute Boston MA USA Harvard Medical School Boston MA USA Massachusetts General Hospital Center for Cancer Research Charlestown MA USA Dana-Farber Cancer Institute Boston MA USA Department of Biostatistics and Computational Biology Dana-Farber Cancer Institute and Harvard Medical School Boston MA USA Weill Cornell Medical College New York NY USA Department of Physiology and Biophysics Weill Cornell Medicine New York NY USA Institute for Computational Biomedicine Weill Cornell Medicine New York NY USA Controlled Department and Institution New York NY USA Englander Institute for Precision Medicine Weill Cornell Medicine Ne

A non-metal single atom nanozyme for cutting off the energy and reducing power of tumors

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Angewandte Chemie 2024年第16期136卷

作者： Junjie Cheng Li Li Duo Jin Yajie Zhang Wenxin Yu Jiaji Yu Jianhua Zou Yi Dai Yang Zhu Manman Liu Miya Zhang Yongfu Sun Yangzhong Liu Xiaoyuan Chen Department of Chemistry Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of China Hefei 230026 China Hefei National Research Center for Physical Sciences at Microscale University of Science and Technology of China Hefei 230026 China Central Laboratory Department of Biobank Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese Medicine Nanjing 210022 China Departments of Diagnostic Radiology Surgery Chemical and Biomolecular Engineering and Biomedical Engineering Yong Loo Lin School of Medicine and College of Design and Engineering National University of Singapore Singapore 119074 Singapore Clinical Imaging Research Centre Centre for Translational Medicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117599 Singapore Nanomedicine Translational Research Program NUS Center for Nanomedicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore Institute of Molecular and Cell Biology Agency for Science Technology and Research (A*STAR) 61 Biopolis Drive Proteos Singapore 138673 Singapore College of Pharmaceutical Sciences Anhui Xinhua University Hefei 230088 China

Detection of an Earth-sized exoplanet orbiting the nearby ultracool dwarf star SPECULOOS-3

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arXiv 2024年

作者： Gillon, Michaël Pedersen, Peter P. Rackham, Benjamin V. Dransfield, Georgina Ducrot, Elsa Barkaoui, Khalid Burdanov, Artem Y. Schroffenegger, Urs Chew, Yilen Gómez Maqueo Lederer, Susan M. Alonso, Roi Burgasser, Adam J. Howell, Steve B. Narita, Norio de Wit, Julien Demory, Brice-Olivier Queloz, Didier Triaud, Amaury H.M.J. Delrez, Laetitia Jehin, Emmanuël Hooton, Matthew J. Garcia, Lionel J. Muñoz, Clàudia Jano Murray, Catriona A. Pozuelos, Francisco J. Sebastian, Daniel Timmermans, Mathilde Thompson, Samantha J. Zúñiga-Fernández, Sebastián Aceituno, Jesús Aganze, Christian Amado, Pedro J. Baycroft, Thomas Benkhaldoun, Zouhair Berardo, David Bolmont, Emeline Clark, Catherine A. Davis, Yasmin T. Davoudi, Fatemeh de Beurs, Zoë L. de Leon, Jerome P. Ikoma, Masahiro Ikuta, Kai Isogai, Keisuke Fukuda, Izuru Fukui, Akihiko Gerasimov, Roman Ghachoui, Mourad Günther, Maximilian N. Hasler, Samantha Hayashi, Yuya Heng, Kevin Hu, Renyu Kagetani, Taiki Kawai, Yugo Kawauchi, Kiyoe Kitzmann, Daniel Koll, Daniel D.B. Lendl, Monika Livingston, John H. Lyu, Xintong Meier Valdés, Erik A. Mori, Mayuko McCormac, James J. Murgas, Felipe Niraula, Prajwal Pallé, Enric Plauchu-Frayn, Ilse Rebolo, Rafael Sabin, Laurence Schackey, Yannick Schanche, Nicole Selsis, Franck Sota, Alfredo Stalport, Manu Standing, Matthew R. Stassun, Keivan G. Tamura, Motohide Theissen, Christopher A. Turbet, Martin Van Grootel, Valérie Varas, Roberto Watanabe, Noriharu Lang, Francis Zong Astrobiology Research Unit Université de Liège Allée du 6 août 19 Liège4000 Belgium Cavendish Laboratory JJ Thomson Avenue CambridgeCB3 0HE United Kingdom Department of Physics ETH Zurich Wolfgang-Pauli-Strasse 2 ZurichCH-8093 Switzerland Department of Earth Atmospheric and Planetary Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Kavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology CambridgeMA United States School of Physics & Astronomy University of Birmingham Edgbaston BirminghamB15 2TT United Kingdom LESIA Observatoire de Paris CNRS Université Paris Diderot Université Pierre et Marie Curie 5 place Jules Janssen Meudon92190 France Calle Vía Láctea s/n Tenerife La Laguna38200 Spain Center for Space and Habitability University of Bern Gesellschaftsstrasse 6 BernCH-3012 Switzerland Instituto de Astronomía Universidad Nacional Autónoma de México Ciudad Universitaria Ciudad de México04510 Mexico NASA Johnson Space Center 2101 NASA Parkway HoustonTX77058 United States Departamento de Astrofísica Universidad de La Laguna Astrofísico Francisco Sánchez s/n Tenerife La Laguna38206 Spain Department of Astronomy & Astrophysics University of California San Diego La Jolla San DiegoCA92093 United States NASA Ames Research Center Moffett FieldCA94035 United States Komaba Institute for Science The University of Tokyo 3-8-1 Komaba Meguro Tokyo153-8902 Japan Astrobiology Center 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Institute Université de Liège Allée du 6 Août 19C LiègeB-4000 Belgium Institute of Astronomy KU Leuven Celestijnenlaan 200D Leuven3001 Belgium Center for Computational Astrophysics Flatiron Institute 162 Fifth Avenue New YorkNY10010 United States Department of Astrophysical and Planetary Sciences University of Colorado Boulder BoulderCO80309 United States Glorieta de la Astronomía s/n GranadaE-18008 Spain Centro Astro

Located at the bottom of the main-sequence, ultracool dwarf stars are widespread in the solar neighborhood. Nevertheless, their extremely low luminosity has left their planetary population largely unexplored, and only one of them, TRAPPIST-1, has so far been found to host a transiting planetary system. In this context, we present the SPECULOOS project’s detection of an Earth-sized planet in a 17-hour orbit around an ultracool dwarf of M6.5 spectral type located 16.8 parsecs away. The planet’s high irradiation (16 times that of Earth) combined with the infrared luminosity and Jupiter-like size of its host star make it one of the most promising rocky exoplanets for detailed emission spectroscopy characterization with JWST. Indeed, our sensitivity study shows that just 10 secondary eclipse observations with the Mid-InfraRed Instrument Low-Resolution Spectrometer on board JWST should bring strong constraints on its atmospheric composition and/or surface mineralogy. © 2024, CC BY.

关键词： Emission spectroscopy

EMPRESS. IX. Extremely Metal-Poor Galaxies are Very Gas-Rich Dispersion-Dominated Systems: Will JWST Witness Gaseous Turbulent High-z Primordial Galaxies?

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arXiv 2022年

作者： Isobe, Yuki Ouchi, Masami Nakajima, Kimihiko Ozaki, Shinobu Bouché, Nicolas F. Wise, John H. Xu, Yi Emsellem, Eric Kusakabe, Haruka Hattori, Takashi Nagao, Tohru Chiaki, Gen Fukushima, Hajime Harikane, Yuichi Hayashi, Kohei Hirai, Yutaka Kim, Ji Hoon Maseda, Michael V. Nagamine, Kentaro Shibuya, Takatoshi Sugahara, Yuma Yajima, Hidenobu Aoyama, Shohei Fujimoto, Seiji Fukushima, Keita Hatano, Shun Inoue, Akio K. Ishigaki, Tsuyoshi Kawasaki, Masahiro Kojima, Takashi Komiyama, Yutaka Koyama, Shuhei Koyama, Yusei Lee, Chien-Hsiu Matsumoto, Akinori Mawatari, Ken Moriya, Takashi J. Motohara, Kentaro Murai, Kai Nishigaki, Moka Onodera, Masato Ono, Yoshiaki Rauch, Michael Saito, Tomoki Sasaki, Rin Suzuki, Akihiro Takeuchi, Tsutomu T. Umeda, Hiroya Umemura, Masayuki Watanabe, Kuria Yabe, Kiyoto Zhang, Yechi Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwanoha Chiba Kashiwa277-8582 Japan Department of Physics Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan University of Tokyo Chiba Kashiwa277-8583 Japan Univ Lyon Univ Lyon1 ENS de Lyon CNRS Centre de Recherche Astrophysique de Lyon UMR5574 Saint-Genis-LavalF-69230 France Center for Relativistic Astrophysics School of Physics Georgia Institute of Technology AtlantaGA30332 United States Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-0033 Japan European Southern Observatory Karl-Schwarzschild-Straße 2 Garching85748 Germany Observatoire de Genéve Université de Genéve 51 Ch. des Maillettes Versoix1290 Switzerland 650 North A'ohoku Place HiloHI96720 United States Research Center for Space and Cosmic Evolution Ehime University Bunkyo-cho 2-5 Ehime Matsuyama790-8577 Japan Center for Computational Sciences University of Tsukuba Ten-nodai 1-1-1 Tsukuba Ibaraki305-8577 Japan Department of Physics and Astronomy University College London Gower Street LondonWC1E 6BT United Kingdom National Institute of Technology Ichinoseki College Hagisho Ichinoseki021-8511 Japan Astronomical Institute Tohoku University 6-3 Aoba Aramaki Aoba-ku Miyagi Sendai980-8578 Japan Department of Physics and Astronomy University of Notre Dame 225 Nieuwland Science Hall Notre DameIN46556 United States Astronomy Program Department of Physics and Astronomy Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of SNU Astronomy Research Center Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Department of Astronomy University of Wisconsin-Madison 475 N. Charter Street MadisonWI53706 United States Theoretical Astrophysics Department of Earth & Space S

We present kinematics of 6 local extremely metal-poor galaxies (EMPGs) with low metallicities (0.016 − 0.098 Z☉) and low stellar masses (104.7 − 107.6M☉). Taking deep medium-high resolution (R ∼ 7500) integral-field spectra with 8.2-m Subaru, we resolve the small inner velocity gradients and dispersions of the EMPGs with Hα emission. Carefully masking out sub-structures originated by inflow and/or outflow, we fit 3-dimensional disk models to the observed Hα flux, velocity, and velocity-dispersion maps. All the EMPGs show rotational velocities (vrot) of 5-23 km s−1 smaller than the velocity dispersions (σ0) of 17-31 km s−1, indicating dispersion-dominated (vrot/σ0 = 0.29−0.80 gas 0.9 − 1.0. Comparing our results with other Hα kinematics studies, we find that vrot/σ0 decreases and fgas increases with decreasing metallicity, decreasing stellar mass, and increasing specific star-formation rate. We also find that simulated high-z (z ∼ 7) forming galaxies have gas fractions and dynamics similar to the observed EMPGs. Our EMPG observations and the simulations suggest that primordial galaxies are gas-rich dispersion-dominated systems, which would be identified by the forthcoming James Webb Space Telescope (JWST) observations at z ∼ 7. Copyright © 2022, The Authors. All rights reserved.

关键词： Galaxies