A Brown Dwarf Orbiting around the Planetary-nebula Central Binary KV Vel
文献类型：期刊论文
| 作者 | Qian, S.-B.4,5; Zhu LY(朱俐颖)2,3 ; Li, F.-X.4,5; Li LJ(李临甲)3; Han, Z.-T.1; He JJ(何家佳)3; Zang, L.4,5; Chang, L.-F.4,5; Sun, Q.-B.4,5; Li, M.-Y.4,5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2024-09-01 |
| 卷号 | 972期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ad631a |
| 产权排序 | 第3完成单位 |
| 文献子类 | Article |
| 英文摘要 | KV Vel is a noneclipsing short-period (P = 0.3571 days) close binary containing a very hot subdwarf primary (77,000 K) and a cool low-mass secondary star (3400 K) that is located at the center of the planetary nebula DS 1. The changes in the orbital period of the close binary were analyzed based on 262 new times of light maximum together with those compiled from the literature. It is discovered that the O - C curve shows a small-amplitude (0.(d)0034) cyclic period variation with a period of 29.55 yr. The explanation by the solar-type magnetic activity cycles of the cool component is ruled out because the required energies are much larger than the total radiant energy of this component in a whole cycle. Therefore, the cyclic variation was plausibly explained as the light-travel time effect via the presence of a tertiary component, which is supported by the periodic changes of the O - C curve and the rather symmetric and stable light curves obtained by the Transiting Exoplanet Survey Satellite. The mass of the tertiary companion is determined to be M-3 sini '=0.060(+/- 0.007) M-circle dot. If the third body is coplanar with the central binary (i.e., i '=62.degrees 5 ), the mass of the tertiary component is computed as M-3 similar to 0.068 M-circle dot, and thus it would be below the stable hydrogen-burning limit and is a brown dwarf. The orbital separation is shorter than 9.35 au. KV Vel together with its surrounding planetary nebula and the brown-dwarf companion may be formed through the common-envelope evolution after the primary filled its Roche lobe during the early asymptotic giant branch stage. |
| 学科主题 | 天文学 |
| URL标识 | 查看原文 |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| WOS关键词 | COMMON ENVELOPE BINARY ; CENTRAL STAR ; PERIOD ; VARIABILITY ; EVOLUTION |
| 资助项目 | National Key R&D Program of China[2022YFE0116800]; National Natural Science Foundation of China[11933008]; National Natural Science Foundation of China[11922306]; National Natural Science Foundation of China[11703083]; National Natural Science Foundation of China[11903076]; NASA Science Mission Directorate; TESS team |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001295974100001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | National Key R&D Program of China[2022YFE0116800] ; National Natural Science Foundation of China[11933008, 11922306, 11703083, 11903076] ; NASA Science Mission Directorate ; TESS team |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27559]  |
| 专题 | 云南天文台_双星与变星研究组 |
| 作者单位 | 1.Department of Physics, Yuxi Normal University, Phoenix Road 134, 653100 Yuxi, People's Republic of China 2.University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, 100049 Beijing, People's Republic of China; 3.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, People's Republic of China; 4.Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University, 650091 Kunming, People's Republic of China; 5.Department of Astronomy, School of Physics and Astronomy, Yunnan University, 650091 Kunming, People's Republic of China; qiansb@ynu.ac.cn; |
| 推荐引用方式 GB/T 7714 | Qian, S.-B.,Zhu LY,Li, F.-X.,et al. A Brown Dwarf Orbiting around the Planetary-nebula Central Binary KV Vel[J]. ASTROPHYSICAL JOURNAL,2024,972(1). |
| APA | Qian, S.-B..,朱俐颖.,Li, F.-X..,李临甲.,Han, Z.-T..,...&Yan, F.-Z..(2024).A Brown Dwarf Orbiting around the Planetary-nebula Central Binary KV Vel.ASTROPHYSICAL JOURNAL,972(1). |
| MLA | Qian, S.-B.,et al."A Brown Dwarf Orbiting around the Planetary-nebula Central Binary KV Vel".ASTROPHYSICAL JOURNAL 972.1(2024). |
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来源：云南天文台
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