HD 29587是一颗质量、大小与太阳相似[6]的恒星,可能具有一颗褐矮星伴星[7]。HD 29587位于北英仙座,视星等为7.29[2],不能通过裸眼观测到。根据其每年6993175987366242761♠36.3 mas的恒星视差[1],可以推测出HD 29587距离太阳系约89.8光年。以太阳为参照系,HD 29587正以+113千米/秒的径向速度远离地球[1]。大约148,000年前,HD 29587距离太阳系的距离曾一度近到大约55.8光年[2]。HD 29587属于高速星族[6]。以本地静止标准,HD 29587拥有170千米/秒的相对速度[8]。
HD 29587的恒星光谱属于G2 V[3],可划入G型主序星中。她的质量是太阳的78%,恒星光度大约是太阳的80%,表面有效温度是5,709K[3]。
已发现HD 29587的径向速度会发生变化,因而推测可能有一个环绕HD 29587的天体,半长轴(a)与轨道倾角(i)正弦值的乘积(a sin i)是0.0957 ± 0.0108 AU(14.31 ± 1.62 G米)[4]。这一天体HD 29587b质量大约是木星的41.0-97.8倍,因此可能是一颗褐矮星[9]。
HD 29587的行星系[9]
成員 (依恆星距離)
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质量
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半長軸 (AU)
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轨道周期 (天)
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離心率
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傾角
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半径
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HD 29587 b
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≥6999780000000000000♠0.78±0.03 MJ
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≥6998956999999999999♠0.0957±0.0108
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7003147490000000000♠1,474.9±10.2
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6999356000000000000♠0.356±0.095
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- ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; et al. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy & Astrophysics. 2018. Bibcode:2018A&A...616A...1G. arXiv:1804.09365 . doi:10.1051/0004-6361/201833051.
- ^ 2.0 2.1 2.2 Anderson, E.; Francis, Ch. XHIP: An extended hipparcos compilation. Astronomy Letters. 2012, 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971 . doi:10.1134/S1063773712050015.
- ^ 3.0 3.1 3.2 3.3 3.4 3.5 Da Silva, Ronaldo; et al. Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets. Astronomy & Astrophysics. 2015, 580: A24. Bibcode:2015A&A...580A..24D. doi:10.1051/0004-6361/201525770.
- ^ 4.0 4.1 Halbwachs, J. L.; et al. Exploring the brown dwarf desert with Hipparcos. Astronomy and Astrophysics. March 2000, 355: 581–594. Bibcode:2000A&A...355..581H.
- ^ HD 29587. SIMBAD. 斯特拉斯堡天文資料中心.
- ^ 6.0 6.1 Fossati, L.; et al. The effect of ISM absorption on stellar activity measurements and its relevance for exoplanet studies. Astronomy & Astrophysics. May 2015, 601: 17. Bibcode:2017A&A...601A.104F. arXiv:1702.02883 . doi:10.1051/0004-6361/201630339. A104.
- ^ Mazeh; Latham, David W.; Stefanik, Robert P. Spectroscopic Orbits for Three Binaries with Low-Mass Companions and the Distribution of Secondary Masses near the Substellar Limit. Astrophysical Journal. 1996, 466: 415–427. Bibcode:1996ApJ...466..415M. CiteSeerX 10.1.1.30.5905 . doi:10.1086/177521.
- ^ Hobbs, L. M.; Duncan, Douglas K. The lithium abundance in halo stars. Astrophysical Journal, Part 1. June 15, 1987, 317: 796–809. Bibcode:1987ApJ...317..796H. doi:10.1086/165328.
- ^ 9.0 9.1 Reffert, S.; Quirrenbach, A. Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: nine confirmed planets and two confirmed brown dwarfs. Astronomy & Astrophysics. March 2011, 527: 22. Bibcode:2011A&A...527A.140R. arXiv:1101.2227 . doi:10.1051/0004-6361/201015861. A140.