| OBSERVATIONS OF DOPPLER BOOSTING IN KEPLER LIGHT CURVES | |
van Kerkwijk, MH1,2; Rappaport, SA3; Breton, RP1,2; Justham, S1; Podsiadlowski, P4; Han ZW(韩占文)5 ; van Kerkwijk, MH (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL
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| 2010-05-20 | |
| 卷号 | 715期号:1页码:51-58 |
| DOI | 10.1088/0004-637X/715/1/51 |
| 产权排序 | 第5完成单位 |
| 收录类别 | SCI |
| 关键词 | Binaries: Eclipsing Stars: Evolution Techniques: Photometric Stars: Individual (Koi 74 White Dwarfs Koi 81) |
| 摘要 | Among the initial results from Kepler were two striking light curves, for KOI 74 and KOI 81, in which the relative depths of the primary and secondary eclipses showed that the more compact, less luminous object was hotter than its stellar host. That result became particularly intriguing because a substellar mass had been derived for the secondary in KOI 74, which would make the high temperature challenging to explain; in KOI 81, the mass range for the companion was also reported to be consistent with a substellar object. We re-analyze the Kepler data and demonstrate that both companions are likely to be white dwarfs. We also find that the photometric data for KOI 74 show a modulation in brightness as the more luminous star orbits, due to Doppler boosting. The magnitude of the effect is sufficiently large that we can use it to infer a radial velocity amplitude accurate to 1 km s(-1). As far as we are aware, this is the first time a radial-velocity curve has been measured photometrically. Combining our velocity amplitude with the inclination and primary mass derived from the eclipses and primary spectral type, we infer a secondary mass of 0.22 +/- 0.03 M(circle dot). We use our estimates to consider the likely evolutionary paths and mass-transfer episodes of these binary systems. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 0004-637X |
| URL | 查看原文 |
| WOS记录号 | WOS:000277216100005 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | SUBDWARF-B-STARS ; X-RAY BINARIES ; LOW-MASS ; HORIZONTAL-BRANCH ; COMPANIONS ; EVOLUTION ; ROTATION ; REGULUS ; PERFORMANCE ; PULSARS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4502 |
| 专题 | 大样本恒星演化研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | van Kerkwijk, MH (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China. |
| 作者单位 | 1.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing, China 2.Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada 3.37-602B, MIT Department of Physics and Kavli Institute for Astrophysics and Space Research, 70 Vassar St., Cambridge, MA 02139, USA 4.Sub-department of Astrophysics, University of Oxford, Keble Road, Oxford OX1 3RH, UK 5.National Astronomical Observatories/Yunnan Observatory and Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | van Kerkwijk, MH,Rappaport, SA,Breton, RP,et al. OBSERVATIONS OF DOPPLER BOOSTING IN KEPLER LIGHT CURVES[J]. ASTROPHYSICAL JOURNAL,2010,715(1):51-58. |
| APA | van Kerkwijk, MH.,Rappaport, SA.,Breton, RP.,Justham, S.,Podsiadlowski, P.,...&van Kerkwijk, MH .(2010).OBSERVATIONS OF DOPPLER BOOSTING IN KEPLER LIGHT CURVES.ASTROPHYSICAL JOURNAL,715(1),51-58. |
| MLA | van Kerkwijk, MH,et al."OBSERVATIONS OF DOPPLER BOOSTING IN KEPLER LIGHT CURVES".ASTROPHYSICAL JOURNAL 715.1(2010):51-58. |
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| OBSERVATIONS OF DOPP（521KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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