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格利泽832c

Gliese 832 c
太阳系外行星 太阳系外行星列表

艺术家绘画的格利泽832c
母恒星
母恒星 格利泽832
星座 天鹤座
赤经 (α) 21h 33m 33.9752s
赤纬 (δ) –49° 00′ 32.422″
距离16.10 ly (4.938 pc)
光谱类型 M1.5V
数据库参考
太阳系外行星
百科全书
data
SIMBADdata

格利泽832cGliese 832 cGl 832 cGJ 832 c),是一颗距离地球约16光年,位于天鹤座太阳系外行星,母恒星是红矮星格利泽832[1]。该行星的地球相似指数为0.81,是已知系外行星中该指数最高的行星之一[2]。它位于母恒星的适居带内。

格利泽832c被发现是至今为止潜在适居系外行星中距离地球最近的几个候选者之一[1]

概要

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格利泽832c的质量大约是地球的5.4倍。它的预期表面温度类似地球,但是会随着环绕恒星时与母恒星距离变动而改变。格利泽832c的轨道离心率相对地球而言较高,轨道周期约36日[2]。格利泽832c表面的平均平衡温度推测是253 K(−20℃)[2]。但是它可能拥有浓密大气层,使它的表面温度可能远高于平衡温度,并且更类似金星[3][4]

格利泽832c是位于所属母恒星适居带内的超级地球。虽然它和母恒星的距离远低于日地距离,但其母恒星是红矮星,因此其所接收的能量相当于地球接收的太阳辐射能[1]

发现与意义

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格利泽832c是由新南威尔士大学的天文学家罗伯特·威滕迈耶英语Robert A. Wittenmyer(Robert A. Wittenmyer)领导的国际团队发现[2][1]。该行星被发现时是“适居太阳系外行星目录”内的行星中距离地球第2近的[2]

格利泽832c的发现者描述该行星是“至今最近且最好的适居行星候选者”[5]

天文学家将对格利泽832c进行更进一步研究以确认它是否适合生命存在[4]

参见

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参考资料

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  1. ^ 1.0 1.1 1.2 1.3 Mike Wall, Nearby Alien Planet May Be Capable of Supporting Life, space.com, June 25, 2014 [June 26, 2014], (原始内容存档于2018-07-12) 
  2. ^ 2.0 2.1 2.2 2.3 2.4 Abel Mendez Torres, A Nearby Super-Earth with the Right Temperature but Extreme Seasons, June 25, 2014 [2014-07-01], (原始内容存档于2019-05-13) 
  3. ^ Nancy Atkinson, Nearby Super-Earth is Best Habitable Candidate So Far, Astronomers Say, June 25, 2014 [June 26, 2014], (原始内容存档于2019-06-08) 
  4. ^ 4.0 4.1 David Snelling, Alien planet discovered! And it's not that far away, June 26, 2014 [2014-07-01], (原始内容存档于2014-11-01) 
  5. ^ Hannah Osborne, Gliese 832 c: 'Best Habitable World Candidate' Discovered 16 Light Years Away, International Business Times, June 25, 2014 [June 16, 2014], (原始内容存档于2019-07-13) 

外部链接

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格利泽832c
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