中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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; Bai, Yu1,2; Zhang, Chuan-Peng2; Liu, Ji-Feng1,2,3
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。