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开普勒223

Kepler-223
观测资料
历元 J2000.0
星座 天鹅座
星官
赤经 19h 53m 16.40s[1]
赤纬 +47° 16′ 46.2″[1]
视星等(V)
特性
视星等 (g)15.903[1]
视星等 (r)15.301[1]
视星等 (i)15.105[1]
视星等 (z)14.963[1]
视星等 (D51)15.667[1]
视星等 (J)14.095[1]
视星等 (H)13.727[1]
视星等 (K)13.632[1]
J−K 色指数0.463[1]
详细资料
半径1.095[1] R
表面重力 (log g)4.386[1]
温度5,599[1] K
金属量-0.211[1]
其他命名
KOI-730
, 2MASS J195316.40+471646.1

开普勒223Kepler-223),旧称KOI-730KIC #10227020),是一个位于天鹅座恒星开普勒空间望远镜已经在该恒星周围发现4颗系外行星[2]

行星系统

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KOI-730周围行星的可能位置,轨道周期比例为6:4:4:3
KOI-730周围行星的可能位置,轨道周期比例为8:6:4:3

开普勒空间望远镜已经在开普勒223周围检测到一个尚未证实的行星系统,包含四个行星候选者。天文学家最初认为其中两个行星处于共轨组态,围绕恒星旋转的轨道距离大约相同,公转周期为9.8天,它们位于60°的拉格朗日点,位置互相锁定[3] 。这两个共同轨道的行星被认为被其他两颗行星锁定在轨道共振状态,整体共振为6:4:4:3[4] 。这将是人类已知的第一个共同轨道的行星。

但是天文学家后续的研究表明,另一种可能性更符合观察到的数据,认为四个行星的轨道周期比例为8:6:4:3。此种情况不包含共同轨道的行星[5]

fabrycky等天文学家认为这四颗行星的半径分别为地球半径的1.8、2.1、2.8和2.4倍,公转轨道周期分别为7.4、9.8、14.8和19.7天[6][7]

参考资料

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  1. ^ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 KIC10 Search. Multimission Archive at STScI. 8 October 2009 [5 March 2011]. (原始内容存档于2012-06-30). 
  2. ^ Borucki, W.; et al.. Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data. The Astrophysical Journal. 2011, 736 (1): 19. Bibcode:2011ApJ...736...19B. arXiv:1102.0541可免费查阅. doi:10.1088/0004-637X/736/1/19. 
  3. ^ Chown, Marcus. Two planets found sharing one orbit. New Scientist. Reed Business Information Ltd. [28 February 2011]. (原始内容存档于2012-10-22). 
  4. ^ Emspak, Jesse. Kepler Finds Bizarre Systems. International Business Times. International Business Times Inc. [2 March 2011]. (原始内容存档于2012-04-20). 
  5. ^ Beatty, Kelly. Kepler Finds Planets in Tight Dance. Sky and Telescope. 2011 [11 March 2011]. (原始内容存档于2012-05-29). 
  6. ^ Dynamics of Cats, ExSSII: more transits页面存档备份,存于互联网档案馆), Steinn Sigurðsson, 2011 September 12
  7. ^ Extrasolar Planets Encyclopaedia, KOI-730页面存档备份,存于互联网档案馆

外部链接

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开普勒223
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