Volatile-rich Earth-Mass Planets in the Habitable Zone | Zendy

Marc J. Kuchner | Zendy

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Volatile-rich Earth-Mass Planets in the Habitable Zone

Author(s) -

Marc J. Kuchner

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/378397

Subject(s) - planet , astrobiology , exoplanet , terrestrial planet , circumstellar habitable zone , accretion (finance) , geology , earth (classical element) , astronomy , physics , astrophysics

A small planet is not necessarily a terrestrial planet. Planets that formbeyond the snow line with too little mass to seed rapid gas accretion (<~ 10Earth masses) should be rich in volatile ices like water and ammonia. Some ofthese planets should migrate inward by interacting with a circumstellar disk orwith other planets. Such objects can retain their volatiles for billions ofyears or longer at ~1 AU as their atmospheres undergo slow hydrodynamic escape.These objects could appear in future surveys for extrasolar Earth analogs.Comment: 12 pages, including 1 figure. To appear in ApJ letters October 10, 200

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