Discovery of the Black Hole X-Ray Binary Transient MAXI J1348–630
文献类型：期刊论文
| 作者 | Tominaga,Mayu6; Nakahira,Satoshi6; Shidatsu,Megumi7; Oeda,Motoki5; Ebisawa,Ken6; Sugawara,Yasuharu6; Negoro,Hitoshi4; Kawai,Nobuyuki5; Sugizaki,Mutsumi3; Ueda,Yoshihiro2 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 899期号:1 |
| ISSN号 | 2041-8205 |
| 关键词 | Black holes Compact objects High energy astrophysics X-ray novae Stellar accretion disks |
| DOI | 10.3847/2041-8213/abaaaa |
| 英文摘要 | Abstract We report the first half-year monitoring of the new Galactic black hole candidate MAXI J1348–630, discovered on 2019 January 26 with the Gas Slit Camera on board the Monitor of All-sky X-ray Image (MAXI). During the monitoring period, the source exhibited two outburst peaks, where the first peak flux (at T?=?14 days from the discovery of T?=?0) was ～4 Crab (2–20 keV) and the second one (at T?=?132 days) was ～0.4 Crab (2–20 keV). The source exhibited distinct spectral transitions between the high/soft and low/hard states and an apparent “q”-shape curve on the hardness-intensity diagram, both of which are well-known characteristics of black hole binaries (BHBs). Compared to other bright black hole transients, MAXI J1348–630 is characterized by its low disk temperature (～0.75 keV at the maximum) and high peak flux in the high/soft state. The low peak temperature leads to a large innermost radius that is identified as the innermost stable circular orbit, determined by the black hole mass and spin. Assuming the empirical relation between the soft-to-hard transition luminosity (Ltrans) and the Eddington luminosity (LEdd), Ltrans/LEdd?≈?0.02, and a face-on disk around a non-spinning black hole, the source distance and the black hole mass are estimated to be D?≈?4 kpc and , respectively. The black hole is more massive if the disk is inclined and the black hole is spinning. These results suggest that MAXI J1348–630 may host a relatively massive black hole among the known BHBs in our Galaxy. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-899-1-ABAAAA |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62765]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.High Energy Astrophysics Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan 2.Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan 3.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, People’s Republic of China 4.Department of Physics, Nihon University, 1-8-14 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan 5.Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan 6.Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa, 252-5210, Japan; tominaga@ac.jaxa.jp 7.Department of Physics, Ehime University, 2-5, Bunkyocho, Matsuyama, Ehime 790-8577, Japan |
| 推荐引用方式 GB/T 7714 | Tominaga,Mayu,Nakahira,Satoshi,Shidatsu,Megumi,et al. Discovery of the Black Hole X-Ray Binary Transient MAXI J1348–630[J]. The Astrophysical Journal Letters,2020,899(1). |
| APA | Tominaga,Mayu.,Nakahira,Satoshi.,Shidatsu,Megumi.,Oeda,Motoki.,Ebisawa,Ken.,...&Mihara,Tatehiro.(2020).Discovery of the Black Hole X-Ray Binary Transient MAXI J1348–630.The Astrophysical Journal Letters,899(1). |
| MLA | Tominaga,Mayu,et al."Discovery of the Black Hole X-Ray Binary Transient MAXI J1348–630".The Astrophysical Journal Letters 899.1(2020). |
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来源：国家天文台
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