White-dwarf plus main-sequence binaries identified from the ninth data release of the Sloan Digital Sky Survey
文献类型：期刊论文
| 作者 | Li LF(李立芳)1,2 ; Zhang FH(张奉辉)1,2; Han QW(韩全旺)1,2,3; Kong XY(孔晓阳)1,2,3; Gong XB(龚小波)1,2,3
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2014-12-01 |
| 卷号 | 445期号:2页码:1331-1338 |
| 关键词 | Sun: fundamental parameters stars: AGB and post-AGB binaries: close binaries: spectroscopic stars: evolution |
| ISSN号 | 0035-8711 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Li, LF (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China. |
| 英文摘要 | We have identified 227 new spectroscopic white-dwarf + main-sequence (WDMS) binaries from the ninth data release (DR9) of the Sloan Digital Sky Survey (SDSS). The SDSS spectra of the newly found WDMS binaries with a DA white dwarf and an M-dwarf are analysed based on a spectral decomposition/fitting method. We obtain the effective temperatures, surface gravities and masses of the white dwarf, together with the spectral types and metallicities of the secondary star. Two independent distance estimates are derived from the flux-scaling factors between theWDMSSDSS spectra and the white dwarf and M-dwarf model spectra. We find that about 25 per cent of the newly found WDMS binaries show a significant discrepancy between the two distance estimates. This might be caused by the effects of M-dwarf stellar activity or irradiation of the M-dwarf companions by the white dwarf. The stellar parameter distributions are used to investigate the global properties of the newly found WDMS binaries. We find that the WDMS binaries with a low signal-to-noise ratio (S/N <= 4.0) usually have a massive DA white dwarf component with a higher surface gravity, and the metallicity is usually significantly different from solar. This suggests that the observational selection effects and the spectral S/N of the WDMS binaries have a significant influence on the determinations of these physical parameters of WDMS binaries. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | COMMON ENVELOPE EVOLUTION ; STARS ; SDSS ; SYSTEMS ; UKIDSS ; 1ST |
| 收录类别 | SCI |
| 原文出处 | http://mnras.oxfordjournals.org/content/445/2/1331 |
| 语种 | 英语 |
| WOS记录号 | WOS:000346959400022 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4566]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province 650011, China 2.Key Laboratory for the Structure, and Evolution of Celestial Objects, Chinese Academy of Sciences, PO Box 110, Kunming, Yunnan Province, 650011, China 3.University of the Chinese Academy of Sciences, Beijing, 100049, China |
| 推荐引用方式 GB/T 7714 | Li LF,Zhang FH,Han QW,et al. White-dwarf plus main-sequence binaries identified from the ninth data release of the Sloan Digital Sky Survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,445(2):1331-1338. |
| APA | Li LF,Zhang FH,Han QW,Kong XY,&Gong XB.(2014).White-dwarf plus main-sequence binaries identified from the ninth data release of the Sloan Digital Sky Survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,445(2),1331-1338. |
| MLA | Li LF,et al."White-dwarf plus main-sequence binaries identified from the ninth data release of the Sloan Digital Sky Survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 445.2(2014):1331-1338. |
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来源：云南天文台
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