| 词条 | Eccentric Jupiter | |||||||||||||||||||||||||||||||||||||||
| 释义 |
An eccentric Jupiter is a Jovian planet that orbits its star in an eccentric orbit.[1] Eccentric Jupiters may probably disqualify a planetary system from having Earth-like planets (not habitable exomoons) in it because a massive gas giant with an eccentric orbit may remove all Earth mass planets from the habitable zone. To date, it appears that approximately 7% of all stars (half of the known planetary systems) have an eccentric Jupiter (e > 0.1), making these planets more common than Hot Jupiters.{{Citation needed|date=April 2008}} Out of the more than 200 extrasolar planet discoveries (as of 2006), 15 planets have high eccentricities (e > 0.6).[2] The typical exoplanet with an orbital period greater than 5 days has a median eccentricity of 0.23.[2] Possible habitable zone planets near eccentric Jupiters:[3]
See also
References1. ^{{cite journal |author1=Raymond, Sean N. |author2=Quinn, Thomas |author3=Lunine, Jonathan I. | title=Making other earths: dynamical simulations of terrestrial planet formation and water delivery | journal=Icarus | volume=168 | issue=1 | pages=1–17 |date=March 2004 | doi=10.1016/j.icarus.2003.11.019 | bibcode=2004Icar..168....1R |arxiv = astro-ph/0308159 }} Note: this study treats eccentric Jupiters as giant planets having an orbital eccentricity of 0.1 or greater. {{exoplanet}}2. ^{{cite journal | author=Kathryn; Fischer; Marcy | title=Old, Rich, and Eccentric: Two Jovian Planets Orbiting Evolved Metal-Rich Stars | journal=Publications of the Astronomical Society of the Pacific | year=2009 | volume=121 | issue=880 | pages=613–620 | id= | arxiv=0904.2786|bibcode = 2009PASP..121..613P |doi = 10.1086/599862 |display-authors=etal}} 3. ^1 {{cite journal | url=http://www.iop.org/EJ/article/1538-3881/134/3/1276/205882.html | author=Wittenmyer | year=2007 | title=Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems | journal=The Astronomical Journal | volume=134 | issue=3 | pages=1276–1284 | doi=10.1086/520880 | last2=Endl | first2=Michael | last3=Cochran | first3=William D. | last4=Levison | first4=Harold F. | bibcode=2007AJ....134.1276W|arxiv = 0706.1962 }} 2 : Types of planet|Giant planets |
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