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Effects of galaxy environment on merger fraction?

Astronomy and Astrophysics 2024年 686卷

作者： Pearson, W.J. Santos, D.J.D. Goto, T. Huang, T.-C. Kim, S.J. Matsuhara, H. Pollo, A. Ho, S.C.-C. Hwang, H.S. Malek, K. Nakagawa, T. Romano, M. Serjeant, S. Suelves, L.E. Shim, H. White, G.J. National Centre for Nuclear Research Pasteura 7 Warszawa02-093 Poland Max Planck Institute for Extraterrestrial Physics Gießenbachstraße 1 Garching85748 Germany Institute of Astronomy National Tsing Hua University 101 Section 2. Kuang-Fu Road Hsinchu30013 Taiwan Department of Space and Astronautical Science Graduate University for Advanced Studies SOKENDAI Shonankokusaimura Hayama Miura District Kanagawa240-0193 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency 3-1-1 Yoshinodai Chuo-ku Kanagawa Sagamihara252-5210 Japan Research School of Astronomy and Astrophysics The Australian National University CanberraACT2611 Australia Centre for Astrophysics and Supercomputing Swinburne University of Technology PO Box 218 HawthornVIC3122 Australia OzGrav The Australian Research Council Centre of Excellence for Gravitational Wave Discovery HawthornVIC3122 Australia ASTRO3D The Australian Research Council Centre of Excellence for All-sky Astrophysics in 3D CanberraACT2611 Australia 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 INAF – Osservatorio Astronomico di Padova Vicolo dell’Osservatorio 5 Padova35122 Italy School of Physical Sciences The Open University Walton Hall Milton KeynesMK7 6AA United Kingdom Department of Earth Science Education Kyungpook National University 80 Daehak-ro Buk-gu Daegu41566 Korea Republic of Space Science and Technology Division RALSpace STFC Rutherford Appleton Laboratory Chilton DidcotOX11 0QX United Kingdom

Aims. In this work we examine how environment influences the merger fraction, from the low density field environment to higher density groups and clusters. We also study how the properties of a group or cluster, as well as the position of a galaxy in the group or cluster, influences the merger fraction. Methods. We identified galaxy groups and clusters in the North Ecliptic Pole using a friends-of-friends algorithm and the local density. Once identified, we determined the central galaxies, group radii, velocity dispersions, and group masses of these groups and clusters. Merging systems were identified with a neural network as well as visually. With these identifications and properties of groups and clusters and merging galaxy identifications, we examined how the merger fraction changes as the local density changes for all galaxies as well as how the merger fraction changes as the properties of the groups or clusters change. Results. We find that the merger fraction increases as local density increases and decreases as the velocity dispersion increases, as is often found in the literature. A decrease in merger fraction as the group mass increases is also found. We also find that groups with larger radii have higher merger fractions. The number of galaxies in a group does not influence the merger fraction. Conclusions. The decrease in merger fraction as group mass increases is a result of the link between group mass and velocity dispersion. Hence, this decrease in merger fraction with increasing mass is a result of the decrease of merger fraction with velocity dispersion. The increasing relation between group radii and merger fraction may be a result of larger groups having smaller velocity dispersion at a larger distance from the centre or larger groups hosting smaller, infalling groups with more mergers. However, we do not find evidence of smaller groups having higher merger fractions. c The Authors 2024.

关键词： Galaxies

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Results from the CsI Calorimeter onboard the 2023 ComPair Balloon Flight

arXiv

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arXiv 2024年

作者： Shy, Daniel Woolf, Richard S. Sleator, Clio Phlips, Bernard Grove, J. Eric Wulf, Eric A. Johnson-Rambert, Mary Davis, Mitch Kong, Emily Caligiure, Thomas Crosier, A. Wilder Bolotnikov, Aleksey Cannady, Nicholas Carini, Gabriella A. Caputo, Regina Fried, Jack Ghosh, Priyarshini Griffin, Sean Hays, Elizabeth Herrmann, Sven Kierans, Carolyn Kirschner, Nicholas Liceaga-Indart, Iker McEnery, Julie Mitchell, John Moiseev, A.A. Parker, Lucas Dellapenna, Alfred Perkins, Jeremy S. Sasaki, Makoto Schoenwald, Adam J. Smith, Lucas D. Valverde, Janeth Wasti, Sambid Zajczyk, Anna U.S. Naval Research Laboratory 4555 Overlook Ave SW WashingtonDC20375 United States Technology Service Corporation ArlingtonVA22202 United States Naval Research Enterprise Internship Program U.S. Naval Research Laboratory WashingtonDC20375 United States Brookhaven National Laboratory UptonNY11973 United States NASA Goddard Space Flight Center GreenbeltMD United States Center for Space Sciences and Technology University of Maryland Baltimore County 1000 Hilltop Circle BaltimoreMD21250 United States Center for Research and Exploration in Space Science and Technology NASA/GSFC GreenbeltMD20771 United States Wisconsin IceCube Particle Astrophysics Center University of Wisconsin-Madison 222 W Washington Ave Unit 500 MadisonWI53703 United States The Department of Physics The George Washington University 725 21st NW WashingtonDC20052 United States Catholic University of America 620 Michigan Ave NE WashingtonDC20064 United States University of Maryland at College Park College ParkMD20742 United States Space Remote Sensing and Data Science Los Alamos National Laboratory Los AlamosNM87545 United States

The ComPair gamma-ray telescope is a technology demonstrator for a future gamma-ray telescope called the All-sky Medium Energy Gamma-ray Observatory (AMEGO). The instrument is composed of four subsystems, a double-sided silicon strip detector, a virtual Frisch grid CdZnTe calorimeter, a CsI:Tl based calorimeter, and an anti-coincidence detector (ACD). The CsI calorimeter’s goal is to measure the position and energy deposited from high-energy events. To demonstrate the technological readiness, the calorimeter has flown onboard a NASA scientific balloon as part of the GRAPE-ComPair mission and accumulated around 3 hours of float time at an altitude of 40 km. During the flight, the CsI calorimeter observed background radiation, Regener-Pfotzer Maximum, and several gamma-ray activation lines originating from aluminum. © 2024, CC BY-NC-ND.

关键词： Gamma rays

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Emergence of Non-photoresponsive Catalytic Techniques for Environmental Remediation and Energy Generation

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Chemistry - An Asian Journal 2023年第9期18卷 e202300090页

作者： Kumar Sharma, Manish Khan, Imran Kaswan, Kuldeep Roy Barman, Snigdha Saha, Subhajit Hsieh, Wu-Chiao Chueh, Yu-Lun Wang, Yu-Lin Lee, Sangmin Choi, Dukhyun Lin, Zong-Hong Department of Materials Science and Engineering National Tsing Hua University Hsinchu30013 Taiwan Institute of NanoEngineering and Microsystems National Tsing Hua University Hsinchu30013 Taiwan International Intercollegiate PhD Program National Tsing Hua University Hsinchu30013 Taiwan Department of Renewable Energy Maulana Abul Kalam Azad University of Technology West Bengal741249 India Department of Obstetrics and Gynecology Chang Gung Memorial Hospital and College of Medicine Chang Gung University Taoyuan333 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan School of Mechanical Engineering Chung-Ang University Seoul06974 Korea Republic of Department of Mechanical Engineering Sungkyunkwan University Suwon16419 Korea Republic of Department of Biomedical Engineering National Taiwan University Taipei10617 Taiwan

Catalysis plays a crucial role in all the major applications and challenges in the environment, including energy generation and environmental remediation. Although photocatalysts and electrocatalysts are useful in addressing energy and environmental issues, they have some major drawbacks, such as low efficiency and easy charge recombination which limits their applications. Hence, it is imperative to design and explore new catalytic techniques that include non-photoresponsive catalysts. In this review, the detailed possibilities, characteristics and prospects of non-photoresponsive catalysts, such as piezocatalysts, thermocatalysts, pyrocatalysts, and tribocatalysts along with hybrid catalysts are described. The overall mechanism of each catalytic technique and its applications in different fields such as energy generation, environmental remediation, and carbon dioxide reduction are discussed. © 2023 Wiley-VCH GmbH.

关键词： Electrocatalysts

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Construction of dual Z-scheme Ag3VO4–BiVO4/InVO4 photocatalysts using vanadium source from spent catalysts for contaminated water treatment and bacterial inactivation

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Chemosphere 2024年 363卷 142746页

作者： Lee, Kuen-Chan Hsu, Shih-Chieh Huang, Jen-Hsien Wang, Kuan-Syun Pang, Wei Kong Hu, Chih-Wei Jiang, Yi-Jhen Cho, Er-Chieh Weng, Huei Chu Liu, Ting-Yu Department of Science Education National Taipei University of Education No. 134 Sec. 2 Heping E. Road Da-an District Taipei City106 Taiwan PhD Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University 250 Wuxing Street Taipei City110 Taiwan Department of Chemical and Materials Engineering Tamkang University No. 151 Yingzhuan Road Tamsui District New Taipei City25137 Taiwan Department of Green Material Technology Green Technology Research Institute CPC Corporation No.2 Zuonan Rd. Nanzi District Kaohsiung City81126 Taiwan Department of Materials Engineering Ming Chi University of Technology New Taipei City243303 Taiwan Faculty of Engineering Institute for Superconducting & Electronic Materials University of Wollongong WollongongNSW Australia National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu Science Park Hsinchu30076 Taiwan School of Pharmacy College of Pharmacy Taipei Medical University 250 Wuxing Street Taipei City110 Taiwan Department of Mechanical Engineering Chung Yuan Christian University No. 200 Chungpei Road Chungli District Taoyuan City32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan City32003 Taiwan College of Engineering & Center for Sustainability and Energy Technologies Chang Gung University Taoyuan33302 Taiwan

Vanadate-based photocatalysts have recently attracted substantial attention owing to their outstanding photocatalytic activity for degrading organic pollutants and generating energy via photocatalytic processes. However, the relatively high price of vanadium has hindered the development of vanadate-based photocatalysts for various applications. Spent catalysts obtained from oil refineries typically contain a significant quantity of vanadium, making them valuable for recovery and utilization as precursors for the production of high-value-added photocatalysts. In this study, we transformed the V present in spent catalysts produced by the petrochemical industry into ternary vanadate-based photocatalysts [BiVO4/InVO4/Ag3VO4 (BVO/IVO/AVO, respectively)] designed for water remediation. The ternary composites revealed an enhanced photocatalytic capability, which was 1.42 and 5.1 times higher than those of the binary BVO/IVO and pristine AVO due to the facilitated charge separation. The ternary photocatalysts not only effectively treated wastewater containing various organic dyes, such as methylene blue (MB), rhodamine 6G (R6G), and brilliant green (BG), but also exhibited remarkable photocatalytic performance in the degradation of antibiotics, reduction of Cr(VI), and bacterial inactivation. This paper proposes a feasible route for recycling industrial waste as a source of vanadium to produce highly efficient vanadate-based photocatalysts. © 2024 Elsevier Ltd

关键词： Water pollution

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Modeling Atmospheric Lines By the Exoplanet Community (MALBEC) version 1.0: A CUISINES radiative transfer intercomparison project

arXiv

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arXiv 2024年

作者： Villanueva, Geronimo L. Fauchez, Thomas J. Kofman, Vincent Alei, Eleonora Lee, Elspeth K.H. Janin, Estelle Himes, Michael D. Leconte, Jérémy Leung, Michaela Faggi, Sara Mak, Mei Ting Sergeev, Denis E. Kozakis, Thea Manners, James Mayne, Nathan Schwieterman, Edward W. Howe, Alex R. Batalha, Natasha NASA Goddard Space Flight Center GreenbeltMD United States Integrated Space Science and Technology Institute Department of Physics American University WashingtonDC United States NASA GSFC Sellers Exoplanet Environments Collaboration United States ETH Zurich Institute for Particle Physics & Astrophysics Wolfgang-Pauli-Str. 27 Zurich8093 Switzerland National Center of Competence in Research Planets Center for Space and Habitability University of Bern Gesellschaftsstrasse 6 BernCH-3012 Switzerland School of Earth and Space Exploration Arizona State University TempeAZ85281 United States Planetary Sciences Group Department of Physics University of Central Florida United States NASA Postdoctoral Program Fellow NASA Goddard Space Flight Center GreenbeltMD United States Laboratoire d’astrophysique de Bordeaux Univ. Bordeaux CNRS B18N allée Geoffroy Saint-Hilaire Pessac33615 France Department of Earth and Planetary Sciences University of California RiversideCA92521 United States Physics and Astronomy University of Exeter ExeterEX4 4QL United Kingdom National Space Institute Technical University of Denmark Elektrovej 328 Kgs. Lyngby2800 Denmark Met Office FitzRoy Road ExeterEX1 3PB United Kingdom Department of Earth and Planetary Sciences University of California RiversideCA United States NASA Goddard Space Flight Center 8800 Greenbelt Rd GreenbeltMD20771 United States Center for Research and Exploration in Space Science and Technology NASA/GSFC GreenbeltMD20771 United States NASA Ames Research Center Mountain ViewCA94035 United States

Radiative transfer (RT) models are critical in the interpretation of exoplanetary spectra, in simulating exoplanet climates and when designing the specifications of future flagship observatories. However, most models differ in methodologies and input data, which can lead to significantly different spectra. In this paper, we present the experimental protocol of the MALBEC (Modeling Atmospheric Lines By the Exoplanet Community) project. MALBEC is an exoplanet model intercomparison project (exoMIP) that belongs to the CUISINES (Climates Using Interactive Suites of Intercomparisons Nested for Exoplanet Studies) framework which aims to provide the exoplanet community with a large and diverse set of comparison and validation of models. The proposed protocol tests include a large set of initial participating RT models, a broad range of atmospheres (from Hot Jupiters to temperate terrestrials) and several observation geometries, which would allow us to quantify and compare the differences between different RT models used by the exoplanetary community. Two types of tests are proposed: transit spectroscopy and direct imaging modeling, with results from the proposed tests to be published in dedicated follow-up papers. To encourage the community to join this comparison effort and as an example, we present simulation results for one specific transit case (GJ-1214 b), in which we find notable differences in how the various codes handle the discretization of the atmospheres (e.g., sub-layering), the treatment of molecular opacities (e.g., correlated-k, line-by-line) and the default spectroscopic repositories generally used by each model (e.g., HITRAN, HITEMP, ExoMol). © 2024, CC BY.

关键词： Radiative transfer

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Novel synthesis of manganese cobalt layered double hydroxide and sulfur-doped nickel cobalt layered double hydroxide composite as efficient active material of battery supercapacitor hybrids

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Journal of Energy Storage 2023年 57卷

作者： Hsiao, Yu-Cheng Liao, Chen-Hao Hsu, Chia-Shuo Yougbaré, Sibidou Lin, Lu-Yin Wu, Yung-Fu International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Stanford Byers Center for Biodesign Stanford University CA94305-5428 United States Graduate Institute of Biomedical Optomechatronics College of Biomedical Engineering Taipei Medical University Taipei11031 Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei11696 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taipei106 Taiwan /Nanoro 03 B.P 7192 Ouagadougou03 Burkina Faso Department of Chemical Engineering Ming Chi University of Technology New Taipei City24301 Taiwan

Nickel and cobalt layered double hydroxide (NiCo-LDH) is one of promising active materials of battery supercapacitor hybrids (BSH) as the clean renewable energy. Designing composites and doping heteroatoms are widely applied to solve poor conductivity, serious agglomeration, and structural defects of NiCo-LDH. In this work, manganese cobalt LDH (MnCo-LDH) is firstly incorporated in sulfur-doped NiCo-LDH (S-NiCo-LDH) on Ni foam (NF) via the hydrothermal process as a binder-free electrode of BSH. Favorable morphology with nanowires covered on the vertical grown nanosheet array is successfully designed for MnCo-LDH/S-NiCo-LDH with the large specific surface area and the well-established pore structure. The specific capacitances (CF) of 681.4, 953.9 and 1581.3 F/g are respectively achieved for the NiCo-LDH, S-NiCo-LDH, MnCo-LDH/S-NiCo-LDH electrodes at the current density of 1 A/g. The larger CF value of MnCo-LDH/S-NiCo-LDH is due to larger conductivity and effective charge transfer paths. A BSH assembled using MnCo-LDH/S-NiCo-LDH/NF and graphene/NF electrodes shows a wide potential window of 1.6 V, a large maximum energy density of 46.6 Wh/kg at 0.8 kW/kg, and an excellent cyclic stability with the CF retention of 81% and the Coulombic efficiency higher than 87% after 10,000 times charge/discharge process at the current density of 7 A/g. © 2022

关键词： Supercapacitor

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CCL5 Protects Cortical Neuron Function by Regulating M2 Microglia Activation After Mild Traumatic Brain Injury

SSRN

引用

SSRN 2022年

作者： Tsai, Yih-Jeng Ho, Man-Hau Yen, Chia-Hung Wang, Jia-Yi Burnouf, Thierry Chen, Chia-Yen Wang, Yun Chiang, Yung-Hsiao Hoffer, Barry J. Chou, Szu-Yi Department of Otolaryngology Head and Neck Surgery Shin Kong Wu HoSu Memorial Hospital Taipei Taiwan School of Medicine Fu Jen Catholic University New Taipei City Taiwan Ph.D. Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University National Health Research Institute Taiwan Graduate Institute of Neural Regenerative Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan Department of Biological Science and Technology National Pingtung University of Science and Technology Neipu Pingtung91201 Taiwan Graduate Institute of Medical Sciences College of Medicine Taipei Medical University Taipei11031 Taiwan Department of Neurosurgery Taipei Medical University Hospital Taipei11031 Taiwan Neuroscience Research Center Taipei Medical University Taipei11031 Taiwan International PhD Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University Taipei Taiwan NeuroTMULille International Laboratory Taipei Medical University Taipei Taiwan International PhD Program in Cell Therapy and Regeneration Medicine College of Medicine Taipei Medical University Taipei Taiwan Brain and Consciousness Research Centre TMU Shuang Ho Hospital New Taipei City Taiwan Center for Neuropsychiatric Research National Health Research Institutes Zhunan Miaoli County Taiwan Department of Surgery School of Medicine College of Medicine Taipei Medical University 11031 Taiwan Department of Neurosurgery Case Western Reserve University School of Medicine ClevelandOH United States Scientist Emeritus National Institutes of Health United States International Master Program in Medical Neuroscience College of Medical Science and Technology Taipei Medical University Taipei Taiwan

Cytokines and chemokines play important roles in inflammation and repair following brain injury. M1 microglia are pro-inflammatory which produce cytokines and lead to neural injury;in contrast, M2 microglia are anti-inflammatory, release neurotrophic factors, and promote neural repair processes. Chemokine CCL5, increased after TBI, shows a neuroprotective function by reducing oxidative stress. CCL5 may contribute to the balance between oxidative stress and immune responses after brain injury. Herein, we investigated the role of CCL5 in microglial polarization after mild traumatic brain injury, focusing on the cerebral cortex.C57BL/6 and CCL5 knockout (CCL5-KO) mice were given a mild traumatic brain injury (TBI) using weight-drop. Neurological parameters such as motor and sensory functions were analyzed by mNSS score, accelerating rotarod, beam walking, and adhesive removal tests. Oxidative stress and neuron damage were measured by NADPH oxidase activity, hypoxyloprobe staining and FJC. Performance of motor and sensory functions in both WT and CCL5-KO mice were impaired after brain injury which recovered after 7 days-post-injury (dpi) in the WT group but only after 14 days in the CCL5-KO mouse group. RT-qPCR analysis revealed that pro-inflammation cytokines - IL-1β, TNF-α, and IL-6 were higher in CCL5-KO mice compared to WT mice at 4 and 14 dpi. In contrast, M2-like microglia markers - IL-10 and Agr-1 were increased in WT mouse cortical tissue at 4 dpi. Oxidative stress increased both M1 and M2- related cytokine expression in BV2 cells treated with H 2 O 2;CCL5 treatment increased M2- but suppressed M1- related cytokine gene activation. Intranasal delivery of CCL5 reduced neuronal oxidative stress, increased IL-10 expression and improved motor and sensory functions in CCL5-KO mice after brain *** summary, CCL5, which alters immune responses and protects neurons from TBI damage, has an important function in regulating M2-like microglial polarization during post-

关键词： Polarization

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A superconducting tensor detector for mid-frequency gravitational waves: its multi-channel nature and main astrophysical targets

arXiv

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arXiv 2023年

作者： Bae, Yeong-Bok Park, Chan Son, Edwin J. Ahn, Sang-Hyeon Jeong, Minjoong Kang, Gungwon Kim, Chunglee Kim, Dong Lak Kim, Jaewan Kim, Whansun Lee, Hyung Mok Lee, Yong-Ho Norton, Ronald S. Oh, John J. Oh, Sang Hoon Paik, Ho Jung Daejeon34126 Korea Republic of National Institute for Mathematical Sciences Daejeon34047 Korea Republic of Korea Astronomy and Space Science Institute Daejeon34055 Korea Republic of Supercomputing Center Korea Institute of Science and Technology Information Daejeon34141 Korea Republic of Chung-Ang University Seoul06974 Korea Republic of Department of Physics Ewha Womans University Seoul03760 Korea Republic of Korea Basic Science Institute Daejeon34051 Korea Republic of Department of Physics Myongji University Yongin17058 Korea Republic of Astronomy Program Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Korea Research Institute of Standards and Science Daejeon305-600 Korea Republic of Department of Physics University of Maryland College ParkMD20742 United States

Mid-frequency band gravitational-wave detectors will be complementary for the existing Earth-based detectors (sensitive above 10 Hz or so) and the future space-based detectors such as LISA, which will be sensitive below around 10 mHz. A ground-based superconducting omnidirectional gravitational radiation observatory (SOGRO) has recently been proposed along with several design variations for the frequency band of 0.1 to 10 Hz. For three conceptual designs of SOGRO (e.g., pSOGRO, SOGRO and aSOGRO), we examine their multi-channel natures, sensitivities and science cases. One of the key characteristics of the SOGRO concept is its six detection channels. The response functions of each channel are calculated for all possible gravitational wave polarizations including scalar and vector modes. Combining these response functions, we also confirm the omnidirectional nature of SOGRO. Hence, even a single SOGRO detector will be able to determine the position of a source and polarizations of gravitational waves, if detected. Taking into account SOGRO’s sensitivity and technical requirements, two main targets are most plausible: gravitational waves from compact binaries and stochastic backgrounds. Based on assumptions we consider in this work, detection rates for intermediate-mass binary black holes (in the mass range of hundreds up to 104 M☉) are expected to be 0.0014 − 2.5 yr−1. In order to detect stochastic gravitational wave background, multiple detectors are required. Two aSOGRO detector networks may be able to put limits on the stochastic background beyond the indirect limit from cosmological observations. Copyright © 2023, The Authors. All rights reserved.

关键词： Gravity waves

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Correction: The HDAC inhibitor, MPT0E028, enhances erlotinib induced cell death in EGFR-TKI-resistant NSCLC cells

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Cell death & disease 2024年第7期15卷 490页

作者： M -C Chen C -H Chen J -C Wang A -C Tsai J -P Liou S -L Pan C -M Teng Pharmacological Institute College of Medicine National Taiwan University Taipei Taiwan. The PhD Program for Cancer Biology and Drug Discovery College of Medical Science and Technology Taipei Medical University Taipei Taiwan. School of Pharmacy College of Pharmacy Taipei Medical University Taipei Taiwan. jpl@tmu.edu.tw. The PhD Program for Cancer Biology and Drug Discovery College of Medical Science and Technology Taipei Medical University Taipei Taiwan. slpan@tmu.edu.tw. Pharmacological Institute College of Medicine National Taiwan University Taipei Taiwan. cmteng@ntu.edu.tw.

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The Japanese Vision for the Black Hole Explorer Mission

arXiv

引用

arXiv 2024年

作者： Akiyama, Kazunori Niinuma, Kotaro Hada, Kazuhiro Doi, Akihiro Hagiwara, Yoshiaki Higuchi, Aya E. Honma, Mareki Kawashima, Tomohisa Kolev, Dimitar Koyama, Shoko Masui, Sho Ohsuga, Ken Sano, Hidetoshi Takami, Hideki Tsunetoe, Yuh Uzawa, Yoshinori Akahori, Takuya Akiyama, Yuto Galison, Peter Hayashi, Takayuki J. Hirota, Tomoya Inoue, Makoto Iwata, Yuhei Johnson, Michael D. Kino, Motoki Kofuji, Yutaro Mizuno, Yosuke Moriyama, Kotaro Nagai, Hiroshi Nakamura, Kenta Notsu, Shota Ono, Fumie Oya, Yoko Oyama, Tomoaki Rana, Hannah Saida, Hiromi Saito, Ryo Saito, Yoshihiko Sasada, Mahito Sawada-Satoh, Satoko Takahashi, Mikiya M. Takamura, Mieko Tong, Edward Tsuji, Hiroyuki Yoshioka, Shogo Watanabe, Yoshimasa Massachusetts Institute of Technology Haystack Observatory WestfordMA01886 United States Mizusawa VLBI Observatory National Astronomical Observatory of Japan Iwate023-0861 Japan Black Hole Initiative Harvard University CambridgeMA02138 United States Graduate School of Sciences and Technology for Innovation Yamaguchi University Yamaguchi753-8512 Japan The Graduate School of Science Nagoya City University Aichi467-0001 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Kanagawa252-5210 Japan Department of Space and Astronautical Science The Graduate University for Advanced Studies SOKENDAI Kanagawa229-8510 Japan Natural Science Laboratory Toyo University Tokyo112-8606 Japan Division of Science School of Science and Engineering Tokyo Denki University Saitama350-0394 Japan Department of Astronomy Graduate School of Science The University of Tokyo Tokyo113-0033 Japan Institute for Cosmic Ray Research The University of Tokyo Chiba277-8582 Japan Space Communication Systems Laboratory Wireless Networks Research Center National Institute of Information and Communications Technology Tokyo184-8795 Japan Graduate School of Science and Technology Niigata University Niigata950-2181 Japan Advanced Technology Center National Astronomical Observatory of Japan Tokyo181-8588 Japan Center for Computational Sciences University of Tsukuba Ibaraki305-8577 Japan Faculty of Engineering Gifu University Gifu501-1193 Japan Harvard University CambridgeMA02138 United States Azabu Junior and Senior High School Tokyo106-0046 Japan Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI Tokyo181-8588 Japan Institute of Astronomy and Astrophysics Academia Sinica Taipei10617 Taiwan Center for Astrophysics Harvard & Smithsonian CambridgeMA02138 United States Kogakuin University of Technology & Engineering Academic Support Center 2665-1 Nakano Hachioji Tokyo192-0015 Japan Tsung-Dao Lee Institut

The Black Hole Explorer (BHEX) is a next-generation space very long baseline interferometry (VLBI) mission concept that will extend the ground-based millimeter/submillimeter arrays into space. The mission, closely aligned with the science priorities of the Japanese VLBI community, involves an active engagement of this community in the development of the mission, resulting in the formation of the Black Hole Explorer Japan Consortium. Here we present the current Japanese vision for the mission, ranging from scientific objectives to instrumentation. The Consortium anticipates a wide range of scientific investigations, from diverse black hole physics and astrophysics studied through the primary VLBI mode, to the molecular universe explored via a potential single-dish observation mode in the previously unexplored 50-70 GHz band that would make BHEX the highest-sensitivity explorer ever of molecular oxygen. A potential major contribution for the onboard instrument involves supplying essential elements for its high-sensitivity dual-band receiving system, which includes a broadband 300 GHz SIS mixer and a space-certified multi-stage 4.5K cryocooler akin to those used in the Hitomi and XRISM satellites by the Japan Aerospace Exploration Agency. Additionally, the Consortium explores enhancing and supporting BHEX operations through the use of millimeter/submillimeter facilities developed by the national Astronomical Observatory of Japan, coupled with a network of laser communication stations operated by the national Institute of Information and Communication technology. Copyright © 2024, The Authors. All rights reserved.

关键词： Radio astronomy

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