Einstein Probe Discovery of EP J182730.0-095633: A New Black Hole X-Ray Binary Candidate in Faint Outburst?
文献类型：期刊论文
| 作者 | Cheng, H. Q.6; Zhao, Q. C.4,5; Tao, L.5; Feng, H.5; Zelati, F. Coti2,3; Pan, H. W.6; Wang, A. L.5; Wang, Y. N.6; Ge, M. Y.5; Rau, A.1 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2025-10-01 |
| 卷号 | 991期号:2 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/adf104 |
| 产权排序 | 第15完成单位 |
| 文献子类 | Article |
| 英文摘要 | Black hole X-ray binaries (candidates) currently identified in our Galaxy are mainly transient sources, with the majority discovered through the detection of their X-ray outbursts. Among these, only four were found during faint outbursts exhibiting peak X-ray luminosities LX less than or similar to 1036 erg s-1, likely due to the previous lack of sensitive, wide-field monitoring instruments in the X-ray band. In this Letter, we present the discovery of an intriguing X-ray transient, EP J182730.0-095633, via the Einstein Probe (EP) and subsequent multiwavelength follow-up studies. This transient, located on the Galactic plane, experienced a faint and brief X-ray outburst lasting about 20 days. Its X-ray spectrum is nonthermal and consistent with a power-law model with a nearly constant photon index of Gamma similar to 2 throughout the outburst. A long-lasting mHz quasiperiodic oscillation signal was detected in its X-ray light curve, centered around a frequency of similar to 0.04 Hz. A transient near-infrared source was identified as its counterpart, although no optical emission was detectable, likely due to significant extinction. A radio counterpart was also observed, displaying an inverted radio spectrum with alpha similar to 0.45. The X-ray spectral and temporal characteristics, along with the multiwavelength properties, indicate that the source is a faint low-mass X-ray binary, with the compact object likely being a black hole. This work demonstrates the potential of the EP in discovering new X-ray binaries by capturing faint-level X-ray outbursts. |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | QUASI-PERIODIC OSCILLATIONS ; ADVECTION-DOMINATED ACCRETION ; GAMMA-RAY ; LIGHT CURVES ; PHYSICAL PROCESSES ; GALACTIC-CENTER ; NEUTRON-STAR ; MULTIWAVELENGTH OBSERVATIONS ; TIDAL DISRUPTION ; COMPLETE SAMPLE |
| 资助项目 | Strategic Priority Program on Space Science of the Chinese Academy of Sciences; ESA; MPE; CNES; National Natural Science Foundation of China[12203071]; National Natural Science Foundation of China[12333004]; National Natural Science Foundation of China[12122306]; National Natural Science Foundation of China[12173048]; National Natural Science Foundation of China[12473047]; National Natural Science Foundation of China[12473016]; National Natural Science Foundation of China[12373049]; National Natural Science Foundation of China[12433007]; National Natural Science Foundation of China[12361131579]; National Key Research and Development Program of China[2023YFA1607903]; National Key Research and Development Program of China[2024YFA1611603]; National Key Research and Development Program of China[2024YFA1611604]; National SKA Program of China[2022SKA0130100]; Tianshan Talent Training Program[2023TSYCCX0101]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0550200]; Danish National Research Foundation[817661]; European Research Council (ERC) via the consolidator grant MAGNESIA; UK Space Agency[101189496]; Proof-of-concept grant DeepSpacePULSE; European Union (ERC)[PID2023-153099NA-I00]; Spanish grant; Catalan grant[SGR 2021-01269]; Program Unidad de Excelencia Maria de Maeztu[CEX2020-001058-M]; Ramon y Cajal fellowship[RYC2021-030888-I]; INAF[1.05.23.04.04]; Independent Research Fund Denmark[DFF-4090-00079]; Carlsberg Foundation; China Postdoctoral Science Foundation |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001579068600001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Strategic Priority Program on Space Science of the Chinese Academy of Sciences ; ESA ; MPE ; CNES ; National Natural Science Foundation of China[12203071, 12333004, 12122306, 12173048, 12473047, 12473016, 12373049, 12433007, 12361131579] ; National Key Research and Development Program of China[2023YFA1607903, 2024YFA1611603, 2024YFA1611604] ; National SKA Program of China[2022SKA0130100] ; Tianshan Talent Training Program[2023TSYCCX0101] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0550200] ; Danish National Research Foundation[817661] ; European Research Council (ERC) via the consolidator grant MAGNESIA ; UK Space Agency[101189496] ; Proof-of-concept grant DeepSpacePULSE ; European Union (ERC)[PID2023-153099NA-I00] ; Spanish grant ; Catalan grant[SGR 2021-01269] ; Program Unidad de Excelencia Maria de Maeztu[CEX2020-001058-M] ; Ramon y Cajal fellowship[RYC2021-030888-I] ; INAF[1.05.23.04.04] ; Independent Research Fund Denmark[DFF-4090-00079] ; Carlsberg Foundation ; China Postdoctoral Science Foundation[2025T180874, 2025M773197] ; [DNRF140] ; [101095973] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28622]  |
| 专题 | 云南天文台_中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Tao, L. |
| 作者单位 | 1.Max Planck Institute for Extraterrestrial Physics, Garching, 85748, Germany; 2.Institut d’Estudis Espacials de Catalunya (IEEC), Barcelona, E-08034, Spain; 3.Institute of Space Sciences (ICE), CSIC, Campus UAB, Barcelona, E-08193, Spain; 4.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, People’s Republic of China; 5.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China; taolian@ihep.ac.cn; 6.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100101, People’s Republic of China; 7.ESA/ESTEC, Noordwijk, 2201 AZ, The Netherlands; 8.Institute for Cosmic Ray Research, The University of Tokyo, Kashiwa City, Chiba 277-8582, Japan; 9.Department of Astrophysics/IMAPP, Radboud University, P.O. Box 9010, 6500 GL, Nijmegen, The Netherlands; 10.Niels Bohr Institute, University of Copenhagen, Jagtvej 128, 2200, Copenhagen N, Denmark; |
| 推荐引用方式 GB/T 7714 | Cheng, H. Q.,Zhao, Q. C.,Tao, L.,et al. Einstein Probe Discovery of EP J182730.0-095633: A New Black Hole X-Ray Binary Candidate in Faint Outburst?[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,991(2). |
| APA | Cheng, H. Q..,Zhao, Q. C..,Tao, L..,Feng, H..,Zelati, F. Coti.,...&Zhang, Y. H..(2025).Einstein Probe Discovery of EP J182730.0-095633: A New Black Hole X-Ray Binary Candidate in Faint Outburst?.ASTROPHYSICAL JOURNAL LETTERS,991(2). |
| MLA | Cheng, H. Q.,et al."Einstein Probe Discovery of EP J182730.0-095633: A New Black Hole X-Ray Binary Candidate in Faint Outburst?".ASTROPHYSICAL JOURNAL LETTERS 991.2(2025). |
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