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An investigation of a magnetic cataclysmic variable with a period of 14.1 ks
Wang, Song1,2; Bai, Yu1,2; Zhang, Chuan-Peng2; Liu, Ji-Feng1,2,3
2017
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume17Issue:1
AbstractMagnetic 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.
SubtypeArticle
KeywordStars: Late-type Novae Stars: Magnetic Field Cataclysmic Variables
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationNational Natural Science Foundation of China(11273028 ; National Natural Science Foundation of China(11273028 ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; 11333004) ; 11333004) ; National Natural Science Foundation of China(11273028 ; National Natural Science Foundation of China(11273028 ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; 11333004) ; 11333004)
DOI10.1088/1674-4527/17/1/10
WOS KeywordXMM-NEWTON OBSERVATIONS ; X-RAY SOURCE ; ACCRETION RATE POLARS ; TEXTBOOK EXAMPLE ; DATA RELEASE ; RADIO SURVEY ; STARS ; DISCOVERY ; EMISSION ; BINARY
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(11273028 ; National Natural Science Foundation of China(11273028 ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; 11333004) ; 11333004) ; National Natural Science Foundation of China(11273028 ; National Natural Science Foundation of China(11273028 ; National Astronomical Observatories, Chinese Academy of Sciences ; National Astronomical Observatories, Chinese Academy of Sciences ; 11333004) ; 11333004)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000396489000010
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8263
Collection光学天文研究部
Affiliation1.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
Recommended Citation
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).
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