A Roche lobe-filling hot subdwarf and white dwarf binary: possible detection of an ejected common envelope | |
Li JD(李江丹)8,9,10; Onken, Christopher A6,7; Wolf, Christian6,7; Németh, Péter4,5; Bessell, Mike7; Li ZW(李振威)9,10; Zhang, Xiaobin3; Li, Jiao2; Wang LQ(王璐茜)10; Li LF(李立芳)9,10 | |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
2022-08-05 | |
卷号 | 515期号:3页码:3370-3382 |
关键词 | binaries: close stars: individual: J192054.50-200135.5 subdwarfs white dwarfs |
ISSN号 | 0035-8711 |
DOI | 10.1093/mnras/stac1768 |
产权排序 | 第1完成单位 |
文献子类 | Article |
英文摘要 | Binaries consisting of a hot subdwarf star and an accreting white dwarf (WD) are sources of gravitational wave radiation at low frequencies and possible progenitors of Type Ia supernovae if the WD mass is large enough. Here, we report the discovery of the third binary known of this kind: It consists of a hot subdwarf O (sdO) star and a WD with an orbital period of 3.495 h and an orbital shrinkage of 0.1 s in 6 yr. The sdO star overfills its Roche lobe and likely transfers mass to the WD via an accretion disc. From spectroscopy, we obtain an effective temperature of T-eff = 54 240 +/- 1840 K and a surface gravity of log g = 4.841 +/- 0.108 for the sdO star. From the light curve analysis, we obtain an sdO mass of M-sdO = 0.55 M-circle dot and a mass ratio of q = M-WD/M-sdO = 0.738 +/- 0.001. Also, we estimate that the disc has a radius of similar to 0.41 R-circle dot and a thickness of similar to 0.18 R-circle dot. The origin of this binary is probably a common envelope ejection channel, where the progenitor of the sdO star is either a red giant branch star or, more likely, an early asymptotic giant branch star; the sdO star will subsequently evolve into a WD and merge with its WD companion, likely resulting in an R Coronae Borealis (R CrB) star. The outstanding feature in the spectrum of this object is strong Ca H&K lines, which are blue-shifted by similar to 200 km s(-1) and likely originate from the recently ejected common envelope, and we estimated that the remnant common envelope (CE) material in the binary system has a density similar to 6 x 10(-1)0 g cm(-3). |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星形成与演化 |
URL标识 | 查看原文 |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
资助项目 | National Natural Science Foundation of China[12090040/3] ; National Natural Science Foundation of China[12125303] ; National Natural Science Foundation of China[11733008] ; National Natural Science Foundation of China[12103086] ; National Key R&D Program of China[2021YFA1600401/3] ; China Manned Space Project[CMS-CSST-2021-A10] ; Australian Research Council (ARC)[DP190100252] ; Grant Agency of the Czech Republic[GA.CR 22-34467S] ; Polish National Science Centre[UMO-2017/26/E/ST9/00703] ; Polish National Science Centre[UMO-2017/25/B/ST9/02218] ; National Aeronautics and Space Administration ; NASA Science Mission Directorate ; NASA[NAS 5-26555] ; Australian Research Council[LE130100104] ; Australian National University ; Swinburne University of Technology ; University of Queensland ; University of Western Australia ; University of Melbourne ; Curtin University of Technology ; Monash University, ; Australian Astronomical Observatory ; Astronomy Australia Limited (AAL) ; Australian Government through the Commonwealth's Education Investment Fund (EIF) ; National Collaborative Research Infrastructure Strategy (NCRIS) ; National eResearch Collaboration Tools and Resources (NeCTAR) ; the Australian National Data Service Projects (ANDS) ; [RVO:67985815] |
WOS关键词 | B-STARS ; CONVECTIVE BOUNDARIES ; ORBITAL DECAY ; MASS-TRANSFER ; EVOLUTION ; INTERSTELLAR ; ORIGIN ; APPROXIMATIONS ; DETONATIONS ; KINEMATICS |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000836707600002 |
资助机构 | National Natural Science Foundation of China[12090040/3, 12125303, 11733008, 12103086] ; National Key R&D Program of China[2021YFA1600401/3] ; China Manned Space Project[CMS-CSST-2021-A10] ; Australian Research Council (ARC)[DP190100252] ; Grant Agency of the Czech Republic[GA.CR 22-34467S] ; Polish National Science Centre[UMO-2017/26/E/ST9/00703, UMO-2017/25/B/ST9/02218] ; National Aeronautics and Space Administration ; NASA Science Mission Directorate ; NASA[NAS 5-26555] ; Australian Research Council[LE130100104] ; Australian National University ; Swinburne University of Technology ; University of Queensland ; University of Western Australia ; University of Melbourne ; Curtin University of Technology ; Monash University, ; Australian Astronomical Observatory ; Astronomy Australia Limited (AAL) ; Australian Government through the Commonwealth's Education Investment Fund (EIF) ; National Collaborative Research Infrastructure Strategy (NCRIS) ; National eResearch Collaboration Tools and Resources (NeCTAR) ; the Australian National Data Service Projects (ANDS) ; [RVO:67985815] |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/25541] |
专题 | 云南天文台_大样本恒星演化研究组 |
通讯作者 | Li JD(李江丹); Wolf, Christian; Han ZW(韩占文) |
作者单位 | 1.Department of Astronomy, China West Normal University, Nanchong, 637002, P. R. China 2.Key Lab of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, P. R. China; 3.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, P. R. China; 4.Astroserver.org, Fő tér 1, 8533 Malomsok, Hungary; 5.Stellar Department, Astronomical Institute of the Czech Academy of Sciences, CZ-25 165, Ondřejov, Czech Republic; 6.Centre for Gravitational Astrophysics, Australian National University, Canberra ACT 2600, Australia; 7.Research School of Astronomy and Astrophysics, Australian National University, Weston Creek ACT 2611, Australia; 8.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, P. R. China; 9.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, P. R. China; 10.Yunnan Observatories, Chinese Academy of Sciences (CAS), 396 Yangfangwang, Guandu District, Kunming 650011, P. R. China; |
推荐引用方式 GB/T 7714 | Li JD,Onken, Christopher A,Wolf, Christian,et al. A Roche lobe-filling hot subdwarf and white dwarf binary: possible detection of an ejected common envelope[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,515(3):3370-3382. |
APA | Li JD.,Onken, Christopher A.,Wolf, Christian.,Németh, Péter.,Bessell, Mike.,...&Han ZW.(2022).A Roche lobe-filling hot subdwarf and white dwarf binary: possible detection of an ejected common envelope.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,515(3),3370-3382. |
MLA | Li JD,et al."A Roche lobe-filling hot subdwarf and white dwarf binary: possible detection of an ejected common envelope".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 515.3(2022):3370-3382. |
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