DETECTION OF A TERTIARY BROWN DWARF COMPANION IN THE sdB-TYPE ECLIPSING BINARY HS 0705+6700
文献类型：期刊论文
| 作者 | Qian SB(钱声帮)1,2,3 ; Zhu LY(朱俐颖)1,2,3; Zola, S4,5; Liao WP(廖文萍)1,2,3; Liu L(刘亮)1,2,3; Li LJ(李临甲)1,2,3; Winiarski, M5; Kuligowska, E4; Kreiner, JM5
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
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| 出版日期 | 2009-04-20 |
| 卷号 | 695期号:2页码:L163-L165 |
| 关键词 | binaries: close binaries: eclipsing stars: individual (HS 0705+6700) stars: low-mass brown dwarfs subdwarfs |
| ISSN号 | 2041-8205 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Qian, SB (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Peoples R China. |
| 英文摘要 | HS 0705+6700 is a short-period (P = 2.3 hr), close binary containing a hot sdB-type primary and a fully convective secondary. We have monitored this eclipsing binary for more than two years and as a result, 32 times of light minimum were obtained. Based on our new eclipse times together with these compiled from the literature, it is discovered that the observed-calculated curve of HS 0705+6700 shows a cyclic variation with a period of 7.15 years and a semiamplitude of 92.4 s. The periodic change was analyzed for the light-travel time effect that may be due to the presence of a tertiary companion. The mass of the third body is determined to be M3 sin i' = 0.0377(+/- 0.0043) M(circle dot) when a total mass of 0.617 M(circle dot) for HS 0705+6700 is adopted. For orbital inclinations i' >= 32.degrees 8, the mass of the tertiary component would be below the stable hydrogen-burning limit of M(3) similar to 0.072M(circle dot), and thus it would be a brown dwarf. The third body is orbiting the sdB-type binary at a distance shorter than 3.6 AU. HS 0705+6700 was formed through the evolution of a common envelope after the primary becomes a red giant. The detection of a substellar companion in HS 0705+6700 system at this distance from the binary could give some constraints on stellar evolution in such systems and the interactions between red giants and their companions. |
| 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] | PRE-CATACLYSMIC BINARY ; SUBDWARF-B STARS ; HW VIR-TYPE ; MAGNETIC BRAKING ; PERIOD DECREASE ; CLOSE BINARIES ; ORBITAL PERIOD |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/1538-4357/695/2/L163/ |
| 语种 | 英语 |
| WOS记录号 | WOS:000264872100009 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/5825]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, People's Republic of China 2.United Laboratory of Optical Astronomy, Chinese Academy of Sciences (ULOAC), 100012 Beijing, People's Republic of China 3.Graduate University of the Chinese Academy of Sciences, 10049 Beijing, People's Republic of China 4.Astronomical Observatory, Jagiellonian University, ul. Orla 171, 30-244 Krakow, Poland 5.Mt. Suhora Observatory, Cracow Pedagogical University ul. Podchorazych 2, 30-084 Krakow, Poland |
| 推荐引用方式 GB/T 7714 | Qian SB,Zhu LY,Zola, S,et al. DETECTION OF A TERTIARY BROWN DWARF COMPANION IN THE sdB-TYPE ECLIPSING BINARY HS 0705+6700[J]. ASTROPHYSICAL JOURNAL LETTERS,2009,695(2):L163-L165. |
| APA | Qian SB.,Zhu LY.,Zola, S.,Liao WP.,Liu L.,...&Kreiner, JM.(2009).DETECTION OF A TERTIARY BROWN DWARF COMPANION IN THE sdB-TYPE ECLIPSING BINARY HS 0705+6700.ASTROPHYSICAL JOURNAL LETTERS,695(2),L163-L165. |
| MLA | Qian SB,et al."DETECTION OF A TERTIARY BROWN DWARF COMPANION IN THE sdB-TYPE ECLIPSING BINARY HS 0705+6700".ASTROPHYSICAL JOURNAL LETTERS 695.2(2009):L163-L165. |
入库方式： OAI收割
来源：云南天文台
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