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HD 83443

HD 83443
觀測資料
曆元 J2000.0 (ICRS)
星座 船帆座
星官
赤經 9h 37m 11.83s
赤緯 -43° 16′ 19.94″
視星等(V) 8.24
特性
光谱分类K0V
B−V 色指数0.811
天体测定
自行 (μ) 赤经:22.35 mas/yr
赤纬:-120.76 mas/yr
视差 (π)2.76 ± 22.97 mas
距离134.3 ± 4.0 ly
(41.2 ± 1.2 pc)
绝对星等 (MV)5.16
詳細資料
質量0.79 M
半徑1.04 R
溫度5460 K
金屬量[Fe/H] = 0.33
其他命名
CD-42°5452, HIP 47202
參考資料庫
SIMBAD资料

HD 83443是一颗位于船帆座中的橙矮星,距离太阳系大约142光年。截止2000年,至少有一颗已确认的太阳系外行星围绕其公转。

行星系

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它的行星HD 83443 b是由米歇尔·麦耶领导的日内瓦系外行星探测小组于2000年发现的。[1]它的最小质量与土星的质量相当,轨道是已知最靠近恒星的之一,只有地球到太阳距离的1/25。它只需要三天时间就能公转一周。这颗热木星可能半径比木星略大。

在发现第一颗行星的同一年,日内瓦的研究人员又宣布发现了另一颗行星,编号依惯例为“HD 83443 c”。它的质量比行星b略小,轨道半长轴很短,离心率很大。[2]它的公转周期大约为28.9天。这十分有趣,因为这表明两颗行星之间存在10:1的轨道共振。然而,另一个由天文学家保罗·巴特勒(R. Paul Butler)带领的团队没有检测到任何表明第二颗行星存在的迹象。[3]日内瓦的团队的新观测结果也不能获得这些必须的证据,因此这项发现只能撤销。这种迹象的起源在早期的数据中起了重要作用,但是至今仍不清楚具体是什么。[4]

HD 83443的行星系[4]
成員
(依恆星距離)
质量 半長軸
(AU)
轨道周期
()
離心率 傾角 半径
b >0.38 MJ 0.039 2.98565 ± 0.00003 0.013 ± 0.013

参考资料

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  1. ^ Exoplanets Galore!. European Southern Observatory. 4 May 2000 [2 August 2009]. (原始内容存档于2009年2月28日). 
  2. ^ European Southern Observatory: Six Extrasolar Planets Discovered. SpaceRef Interactive Inc. 7 August 2000 [2 August 2009]. 
  3. ^ Butler; Marcy, Geoffrey W.; Vogt, Steven S.; Tinney, C. G.; Jones, Hugh R. A.; McCarthy, Chris; Penny, Alan J.; Apps, Kevin; Carter, Brad D.; et al. On the Double-Planet System around HD 83443. The Astrophysical Journal. 2002, 578 (1): 565–572. Bibcode:2002ApJ...578..565B. arXiv:astro-ph/0206178可免费查阅. doi:10.1086/342471. 
  4. ^ 4.0 4.1 Mayor; Udry, S.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Burnet, M.; et al. The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE. Astronomy and Astrophysics. 2004, 415: 391–402 [2012-08-23]. Bibcode:2004A&A...415..391M. arXiv:astro-ph/0310316可免费查阅. doi:10.1051/0004-6361:20034250. (原始内容存档于2019-06-16). 

外部链接

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HD 83443
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