An investigation of a magnetic cataclysmic variable with a period of 14.1 ks
文献类型:期刊论文
作者 | Wang, Song1,2![]() ![]() ![]() ![]() |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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出版日期 | 2017 |
卷号 | 17期号:1 |
关键词 | novae, cataclysmic variables stars: late-type stars: magnetic field |
英文摘要 | Magnetic cataclysmic variables (CVs) contain a white dwarf (WD) with a magnetic field strong enough to control the accretion flow from a late type secondary. In this paper, we identify a magnetic CV (CXOGSG J215544.4+380116) from the Chandra archive data. The X-ray light curves show a significant period of 14.1 ks, and the X-ray spectra can be described by a multi-temperature hot thermal plasma, suggesting the source is a magnetic CV. The broad dip in the X-ray light curve is due to the eclipse of the primary magnetic pole, and the additional dip in the bright phase of the soft and medium bands may be caused by the accretion stream crossing our line of sight to the primary pole. Follow-up optical spectra show features of an M2-M4 dwarf dominating the red band and a WD which is responsible for the weak upturn in the blue band. The mass (similar to 0.4 M-circle dot) and radius (similar to 0.4 R-circle dot) for the M dwarf are obtained using CV evolution models and empirical relations between the orbital period and the mass/radius. The estimated low X-ray luminosity and accretion rate may suggest the source is a low-accretion-rate polar. In addition, Very Large Array observations reveal a possible radio counterpart to the X-ray source, but with a low significance. Further radio observations with high quality are needed to confirm the radio counterpart and explore the properties of this binary system. |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | XMM-NEWTON OBSERVATIONS ; X-RAY SOURCE ; ACCRETION RATE POLARS ; TEXTBOOK EXAMPLE ; DATA RELEASE ; RADIO SURVEY ; STARS ; DISCOVERY ; EMISSION ; BINARY |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000396489000010 |
源URL | [http://ir.bao.ac.cn/handle/114a11/8263] ![]() |
专题 | 国家天文台_光学天文研究部 |
作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Song,Bai, Yu,Zhang, Chuan-Peng,et al. An investigation of a magnetic cataclysmic variable with a period of 14.1 ks[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2017,17(1). |
APA | Wang, Song,Bai, Yu,Zhang, Chuan-Peng,&Liu, Ji-Feng.(2017).An investigation of a magnetic cataclysmic variable with a period of 14.1 ks.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,17(1). |
MLA | Wang, Song,et al."An investigation of a magnetic cataclysmic variable with a period of 14.1 ks".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 17.1(2017). |
入库方式: OAI收割
来源:国家天文台
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