查看“︁柯洛2b”︁的源代码

{{Infobox Planet
| bgcolour = #A0B0FF
| image =
| caption =
| name = 柯洛2b
| parent star = yes
| star = 柯洛2
| planet = 
| constell = 巨蛇座
| distance = 930光年
| RA = {{RA|19|27|06.5}}<ref name="alonso08" />
| DEC = {{DEC|+1|023|01.5}}<ref name="alonso08" />
| class = G7V<ref name="bouchy08" />
| discovery = yes
| discovery_ref = 
| discoverer = 柯洛计划
| discovered = 2007年12月
| discovery_method = 凌星测量法
| semimajor = 0.0281 ± 0.0005<ref name="alonso08" /><ref>The paper gives the semimajor axis as 6.70 ± 0.03 times the radius of the star, which is estimated at 0.902 ± 0.018 solar radii.</ref>
| semiminor = 
| orbital_circ = 
| eccentricity = 0(预测)<ref name="alonso08" />
| period = 1.7429964 ± 0.0000017地球日<ref name="alonso08" />
| inclination = 
| long_periastron = 
| time_periastron = 
| semi-amp =
| physical_characteristics = yes
| mean_radius = 1.429 ± 0.047倍木星半径<ref name="alonso08" />
| density = 1310 ± 40千克/立方米<ref name="alonso08" />
| surface_grav = 38.2m/s<sup>2</sup><ref>Calculated using Newtonian gravity: <math>\textstyle g=\frac{GM}{R^2}</math></ref>
| mass = 3.31 ± 0.16倍木星质量<ref name="alonso08">{{cite journal
  | url = http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...482L..21A&db_key=AST&nosetcookie=1
  | author = Alonso |display-authors=etal
  | title = Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star
  | journal = [[Astronomy and Astrophysics]]
  | volume = 482
  | issue = 3
  | year = 2008
  | pages = L21–L24
  | doi=10.1051/0004-6361:200809431}}</ref>
| minimum_mass =
| single_temperature = 1537 ± 35K<ref name="alonso08" />
| magnitude =
}}

'''柯洛2b'''(也被称为'''柯洛-系外行星-2b'''<ref>{{cite mailing list|url=http://listes.obs.ujf-grenoble.fr/wws/arc/exoplanets/2009-03/msg00003.html|title=Change in CoRoT planets names|author=Schneider, J.|date=2009-03-10|accessdate=2009-03-19|mailinglist=Exoplanets|deadurl=yes|archiveurl=https://archive.today/20100118162658/http://listes.obs.ujf-grenoble.fr/wws/arc/exoplanets/2009-03/msg00003.html|archivedate=2010-01-18}}</ref>)是[[法国]]所主持的[[对流旋转和行星横越任务|柯洛计划]]发现的第二颗[[系外行星]]，该行星位于[[巨蛇座]]，距离地球930光年，其母星为[[柯洛2]]。科学家于2007年12月20日对外宣布发现该行星。<ref>{{cite web | title = COROT surprises a year after launch | url = http://www.esa.int/SPECIALS/COROT/SEMF0C2MDAF_0.html | accessdate = 2007-12-21 | archive-date = 2012-04-14 | archive-url = https://www.webcitation.org/66uxz12E3?url=http://www.esa.int/SPECIALS/COROT/SEMF0C2MDAF_0.html | dead-url = no }}</ref>

柯洛2b是一颗大型[[热木星]]，其半径为木星半径的1.43倍，质量约为木星的3.3倍。由于距离母星较近，该行星表面被加热至一个极高的温度，其外层大气急剧膨胀，从而使其体积变得很大。该行星较大的半径表明柯洛2b表面已达到了较高的温度，估计约为1500K，高于原本预计的处于该距离的行星的表面温度。如果它与中央恒星的距离和木星与太阳的距离相仿，则其半径也将与木星大致相同。这表明可能存在另一颗行星与柯洛2b相互作用并产生潮汐热。<ref>{{cite web | title = CoRoT-exo-2 c? | url = http://oklo.org/?p=262 | accessdate = 2007-12-21 | archive-date = 2012-04-14 | archive-url = https://www.webcitation.org/66uxzTulJ?url=http://oklo.org/2007/12/21/corot-exo-2-c/ | dead-url = no }}</ref>

该行星的[[轨道周期]]约为1.7地球日，运行于靠近中央恒星赤道面的[[顺行和逆行|顺行]]轨道上。<ref name="bouchy08">{{cite journal
  | url = http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2008A%26A...482L..25B&db_key=AST&nosetcookie=1
  | author = Bouchy |display-authors=etal
  | title = Transiting exoplanets from the CoRoT space mission. III. The spectroscopic transit of CoRoT-Exo-2b with SOPHIE and HARPS
  | journal = [[Astronomy and Astrophysics]]
  | volume = 482
  | issue = 3
  | year = 2008
  | pages = L25–L28
  | doi=10.1051/0004-6361:200809433}}</ref>中央恒星是一颗G型恒星，温度稍低于太阳，但是显得更加活跃。

== 轨道 ==
2008年8月，鲍奇等人通过[[罗斯特-麦克劳克林效应]]计算出柯洛2b的自旋轨道角（即中央恒星赤道面与行星轨道面的交角）约为+7.2±4.5°。<ref>{{cite journal| journal=A&A |volume=482 |page=L25| title= | author=Bouchy |display-authors=etal |year=2008}}</ref>

== 参考文献 ==
{{Reflist|2}}

== 外部链接 ==
* [http://www.perseus.gr/Astro-Photometry-CoRoTExo2-20080606.htm COROT-Exo-2 light curve using differential photometry] {{Wayback|url=http://www.perseus.gr/Astro-Photometry-CoRoTExo2-20080606.htm |date=20190428142424 }}

{{Sky|19|27|06.5|+|01|23|01.5|930}}


[[Category:太阳系外行星]]
[[Category:巨蛇座]]
[[Category:热木星]]
[[Category:凌星现象]]
[[Category:类木行星]]
[[Category:2007年发现的系外行星]]