SDSS J001153.08-064739.2, A CATACLYSMIC VARIABLE WITH AN EVOLVED DONOR IN THE PERIOD GAP
文献类型：期刊论文
| 作者 | Rebassa-Mansergas, A.1; Parsons, S. G.2; Copperwheat, C. M.3; Justham, S.4 ; Gaensicke, B. T.5; Schreiber, M. R.2,6; Marsh, T. R.5; Dhillon, V. S.7
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-07-20 |
| 卷号 | 790期号:1 |
| 关键词 | binaries: close novae, cataclysmic variables stars: low-mass white dwarfs |
| 英文摘要 | Secondary stars in cataclysmic variables (CVs) follow a well-defined period-density relation. Thus, canonical donor stars in CVs are generally low-mass stars of spectral type M. However, several CVs have been observed containing secondary stars that are too hot for their inferred masses. This particular configuration can be explained if the donor stars in these systems underwent significant nuclear evolution before they reached contact. In this paper, we present SDSS J001153.08-064739.2 as an additional example belonging to this peculiar type of CV and discuss in detail its evolutionary history. We perform spectroscopic and photometric observations and make use of available Catalina Real-Time Transient Survey photometry to measure the orbital period of SDSS J001153.08-064739.2 as 2.4 hr and estimate the white dwarf (M-wd > 0.65 M-circle dot) and donor star (0.21 M-circle dot < M-don < 0.45 M-circle dot) masses, the mass ratio (q = 0.32 +/- 0.08), the orbital inclination (47 degrees < i < 70 degrees); derive an accurate orbital ephemeris (T-0 = 2453383.578(1) + E x 0.10028081(8)); and report the detection of an outburst. We show that SDSS J001153.08-064739.2 is one of the most extreme cases in which the donor star is clearly too hot for its mass. SDSS J001153.08-064739.2 is therefore not only a peculiar CV containing an evolved donor star, but also an accreting CV within the period gap. Intriguingly, approximately half of the total currently observed sample of these peculiar CVs are located in the period gap with nearly the same orbital period. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000338836800028 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6463]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Univ Valparaiso, Dept Fis & Astron, Valparaiso, Chile 3.Liverpool John Moores Univ, Astrophys Res Inst, Liverpool L3 5RF, Merseyside, England 4.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 5.Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England 6.Univ Valparaiso, Millennium Nucleus Protoplanetary Disks ALMA Earl, Valparaiso, Chile 7.Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England |
| 推荐引用方式 GB/T 7714 | Rebassa-Mansergas, A.,Parsons, S. G.,Copperwheat, C. M.,et al. SDSS J001153.08-064739.2, A CATACLYSMIC VARIABLE WITH AN EVOLVED DONOR IN THE PERIOD GAP[J]. ASTROPHYSICAL JOURNAL,2014,790(1). |
| APA | Rebassa-Mansergas, A..,Parsons, S. G..,Copperwheat, C. M..,Justham, S..,Gaensicke, B. T..,...&Dhillon, V. S..(2014).SDSS J001153.08-064739.2, A CATACLYSMIC VARIABLE WITH AN EVOLVED DONOR IN THE PERIOD GAP.ASTROPHYSICAL JOURNAL,790(1). |
| MLA | Rebassa-Mansergas, A.,et al."SDSS J001153.08-064739.2, A CATACLYSMIC VARIABLE WITH AN EVOLVED DONOR IN THE PERIOD GAP".ASTROPHYSICAL JOURNAL 790.1(2014). |
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来源：国家天文台
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