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dc.contributor.authorCharbonneau, David
dc.contributor.authorBerta, Zachory Kaczmarczyk
dc.contributor.authorIrwin, Jonathan M
dc.contributor.authorBurke, Christopher J.
dc.contributor.authorNutzman, Philip Andrew
dc.contributor.authorBuchhave, Lars A.
dc.contributor.authorLovis, Christophe
dc.contributor.authorBonfils, Xavier
dc.contributor.authorLatham, David W.
dc.contributor.authorUdry, Stéphane
dc.contributor.authorMurray-Clay, Ruth Ann
dc.contributor.authorHolman, Matthew J.
dc.contributor.authorFalco, Emilio E.
dc.contributor.authorWinn, Joshua N.
dc.contributor.authorQueloz, Didier
dc.contributor.authorPepe, Francesco
dc.contributor.authorMayor, Michel
dc.contributor.authorDelfosse, Xavier
dc.contributor.authorForveille, Thierry
dc.date.accessioned2010-08-09T20:59:05Z
dc.date.issued2009
dc.identifier.citationCharbonneau, David, Zachory K. Berta, Jonathan Irwin, Christopher J. Burke, Philip Nutzman, Lars A. Buchhave, Christophe Lovis, et al. 2009. A super-earth transiting a nearby low-mass star. Nature 462(7275): 891-894.en_US
dc.identifier.issn0028-0836en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:4339936
dc.description.abstractA decade ago, the detection of the first transiting extrasolar planet provided a direct constraint on its composition and opened the door to spectroscopic investigations of extrasolar planetary atmospheres. Because such characterization studies are feasible only for transiting systems that are both nearby and for which the planet-to-star radius ratio is relatively large, nearby small stars have been surveyed intensively. Doppler studies and microlensing have uncovered a population of planets with minimum masses of 1.9–10 times the Earth’s mass (Mcircle plus), called super-Earths. The first constraint on the bulk composition of this novel class of planets was afforded by CoRoT-7b , but the distance and size of its star preclude atmospheric studies in the foreseeable future. Here we report observations of the transiting planet GJ 1214b, which has a mass of 6.55Mcircle plus and a radius 2.68 times Earth’s radius (Rcircle plus), indicating that it is intermediate in stature between Earth and the ice giants of the Solar System. We find that the planetary mass and radius are consistent with a composition of primarily water enshrouded by a hydrogen–helium envelope that is only 0.05% of the mass of the planet. The atmosphere is probably escaping hydrodynamically, indicating that it has undergone significant evolution during its history. The star is small and only 13 parsecs away, so the planetary atmosphere is amenable to study with current observatories.en_US
dc.description.sponsorshipAstronomyen_US
dc.language.isoen_USen_US
dc.publisherNature Publishing Groupen_US
dc.relation.isversionofdoi:10.1038/nature08679en_US
dc.relation.hasversionhttp://www.eso.org/public/archives/releases/sciencepapers/eso0950/eso0950.pdfen_US
dash.licenseOAP
dc.titleA Super-Earth Transiting a Nearby Low-Mass Staren_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalNature -London-en_US
dash.depositing.authorCharbonneau, David
dc.date.available2010-08-09T20:59:05Z
dc.identifier.doi10.1038/nature08679*
dash.authorsorderedfalse
dash.contributor.affiliatedBurke, Christopher J.
dash.contributor.affiliatedNutzman, Philip
dash.contributor.affiliatedBerta, Zachory
dash.contributor.affiliatedIrwin, Jonathan
dash.contributor.affiliatedMurray-Clay, Ruth
dash.contributor.affiliatedHolman, Matthew
dash.contributor.affiliatedLatham, David
dash.contributor.affiliatedCharbonneau, David


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