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Einstein Probe Discovery of EP J005245.1-722843: A Rare Be-White Dwarf Binary in the Small Magellanic Cloud? | |
Marino, A.1,2; Yang, H. N.3,4,5; Zelati, F. Coti1,2; Rea, N.1,2; Guillot, S.6; Jaisawal, G. K.7; Maitra, C.4; Ness, J.-U.8; Haberl, F.4; Kuulkers, E.9; Yuan, W.3,5; Feng, H.10; Tao, L.10; Jin, C.3,5; Sun, H.3; Zhang, W.3; Chen, W.3,5; Heuvel, E. P. J. van den11; Soria, R.12,13,14; Zhang, B.15,16; Weng, S.-S.17; Ji, L.18; Zhang GB(张国宝)19![]() | |
发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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2025-02-20 | |
卷号 | 980期号:2 |
DOI | 10.3847/2041-8213/ad9580 |
产权排序 | 第19完成单位 |
收录类别 | SCI |
摘要 | On 2024 May 27, the Wide-field X-ray Telescope on board the Space Sciences, University of Chinese Academy of Einstein Probe (EP) mission detected enhanced X-ray emission from a new transient source in the Small Magellanic Cloud during its commissioning phase. Prompt follow-up with the EP Follow-up X-ray Telescope, the Swift X-ray Telescope. and NICER have revealed a very soft, thermally emitting source (kT similar to 0.1 keV at the outburst peak) with an X-ray luminosity of L similar to 4 x 10(38) erg s(-1), labeled EP J005245.1-722843. This supersoft outburst faded very quickly in a week's time. Several emission lines and absorption edges were present in the X-ray spectrum, including deep nitrogen (0.67 keV) and oxygen (0.87 keV) absorption edges. The X-ray emission resembles the supersoft source phase of typical nova outbursts from an accreting white dwarf (WD) in a binary system, despite the X-ray source being historically associated with an O9-B0e massive star exhibiting a 17.55 day periodicity in the optical band. The discovery of this supersoft outburst suggests that EP J005245.1-722843 is a BeWD X-ray binary: an elusive evolutionary stage where two main-sequence massive stars have undergone a common envelope phase and experienced at least two episodes of mass transfer. In addition, the very short duration of the outburst and the presence of Ne features hint at a rather massive, i.e., close to the Chandrasekhar limit, Ne-O WD in the system. |
资助项目 | Strategic Priority Program on Space Science of Chinese Academy of Sciences; CNES[XDA15310000]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0550200]; National Key R&D Program of China[2022YFF0711500]; NASA - ESA Member States; Chandra X-ray Observatory |
项目资助者 | Strategic Priority Program on Space Science of Chinese Academy of Sciences ; CNES[XDA15310000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0550200] ; National Key R&D Program of China[2022YFF0711500] ; NASA - ESA Member States ; Chandra X-ray Observatory |
语种 | 英语 |
学科领域 | 天文学 ; 恒星与银河系 ; 星系与宇宙学 |
文章类型 | Article |
出版者 | IOP Publishing Ltd |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
ISSN | 2041-8205 |
URL | 查看原文 |
WOS记录号 | WOS:001425338500001 |
WOS研究方向 | Astronomy & Astrophysics |
WOS类目 | Astronomy & Astrophysics |
关键词[WOS] | SOFT-X-RAY ; OPTICAL SPECTROSCOPY ; SUPERSOFT SOURCE ; RECURRENT NOVA ; HELIUM STARS ; EVOLUTION ; SPECTRA ; SWIFT ; POPULATION ; PHASE |
引用统计 | |
文献类型 | 期刊论文 |
版本 | 出版稿 |
条目标识符 | http://ir.ynao.ac.cn/handle/114a53/28174 |
专题 | 星系类星体研究组 |
作者单位 | 1.Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans s/n, 08193, Barcelona, Spain; [email protected]; 2.Institut d'Estudis Espacials de Catalunya (IEEC), Esteve Terradas 1, RDIT Building, Of. 212 Mediterranean Technology Park (PMT), 08860, Castelldefels, Spain; 3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China; [email protected]; 4.Max-Planck-Institut für extraterrestrische Physik, Gießenbachstraße 1, D-85748 Garching bei München, Germany; 5.School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China; 6.IRAP, CNRS, 9 avenue du Colonel Roche, BP 44346, 31028 Toulouse Cedex 4, France; 7.DTU Space, Technical University of Denmark, Elektrovej 327-328, DK-2800 Lyngby, Denmark; 8.European Space Agency (ESA), European Space Astronomy Centre (ESAC), Camino Bajo del Castillo s/n, E-28692 Villanueva de la Cañada, Madrid, Spain; 9.European Space Agency (ESA), European Space Research and Technology Centre (ESTEC), Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands; 10.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 11.Anton Pannekoek Institute for Astronomy, University of Amsterdam, P.O. Box 94249, 1090 GE Amsterdam, The Netherlands; 12.INAF—Osservatorio Astrofisico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy; 13.Sydney Institute for Astronomy, School of Physics A28, The University of Sydney, Sydney, NSW 2006, Australia; 14.College of Astronomy and Space Sciences, University of the Chinese Academy of Sciences, Beijing 100049, People's Republic of China; 15.Nevada Center for Astrophysics, University of Nevada Las Vegas, NV 89154, USA; 16.Department of Physics and Astronomy, University of Nevada Las Vegas, NV 89154, USA; 17.Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing, People's Republic of China; 18.School of Physics and Astronomy, Sun Yat-sen University, Zhuhai, 519082, People's Republic of China; 19.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 20.Astrophysics Science Division, NASA's Goddard Space Flight Center, Greenbelt, MD 20771, USA; 21.MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; 22.Joint Space-Science Institute, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA |
推荐引用方式 GB/T 7714 | Marino, A.,Yang, H. N.,Zelati, F. Coti,et al. Einstein Probe Discovery of EP J005245.1-722843: A Rare Be-White Dwarf Binary in the Small Magellanic Cloud?[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,980(2). |
APA | Marino, A..,Yang, H. N..,Zelati, F. Coti.,Rea, N..,Guillot, S..,...&Strohmayer, T..(2025).Einstein Probe Discovery of EP J005245.1-722843: A Rare Be-White Dwarf Binary in the Small Magellanic Cloud?.ASTROPHYSICAL JOURNAL LETTERS,980(2). |
MLA | Marino, A.,et al."Einstein Probe Discovery of EP J005245.1-722843: A Rare Be-White Dwarf Binary in the Small Magellanic Cloud?".ASTROPHYSICAL JOURNAL LETTERS 980.2(2025). |
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