Show simple item record

dc.contributor.authorCharbonneau, David
dc.contributor.authorBerta-Thompson, Zach
dc.contributor.authorIrwin, Jonathan M.
dc.contributor.authorBurke, Christopher J.
dc.contributor.authorNutzman, Philip
dc.contributor.authorBuchhave, Lars A.
dc.contributor.authorLovis, Christophe
dc.contributor.authorBonfils, Xavier
dc.contributor.authorLatham, David W.
dc.contributor.authorUdry, Stephane
dc.contributor.authorMurray-Clay, Ruth A.
dc.contributor.authorHolman, Matthew J.
dc.contributor.authorWinn, Joshua Nathan
dc.contributor.authorQueloz, Didier
dc.contributor.authorPepe, Francesco
dc.contributor.authorMayor, Michel
dc.contributor.authorDelfosse, Xavier
dc.contributor.authorForveille, Thierry
dc.date.accessioned2013-02-12T20:07:04Z
dc.date.available2013-02-12T20:07:04Z
dc.date.issued2009-12
dc.date.submitted2009-10
dc.identifier.issn0028-0836
dc.identifier.issn1476-4687
dc.identifier.urihttp://hdl.handle.net/1721.1/76782
dc.description.abstractA decade ago, the detection of the first1, 2 transiting extrasolar planet provided a direct constraint on its composition and opened the door to spectroscopic investigations of extrasolar planetary atmospheres3. 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 studies4, 5, 6 and microlensing7 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 (refs 8, 9), 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.sponsorshipNational Science Foundation (U.S.) (grant number AST-0807690)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA Kepler mission under cooperative agreement NCC2-1390)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (NASA Origins Grant NNX09AB33G)en_US
dc.description.sponsorshipDavid & Lucile Packard Foundationen_US
dc.language.isoen_US
dc.publisherNature Publishing Groupen_US
dc.relation.isversionofhttp://dx.doi.org/10.1038/nature08679en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alike 3.0en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/en_US
dc.sourcearXiven_US
dc.titleA super-Earth transiting a nearby low-mass staren_US
dc.typeArticleen_US
dc.identifier.citationCharbonneau, David et al. “A super-Earth Transiting a Nearby Low-mass Star.” Nature 462.7275 (2009): 891–894. Web.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorWinn, Joshua Nathan
dc.relation.journalNatureen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsCharbonneau, David; Berta, Zachory K.; Irwin, Jonathan; Burke, Christopher J.; Nutzman, Philip; Buchhave, Lars A.; Lovis, Christophe; Bonfils, Xavier; Latham, David W.; Udry, Stéphane; Murray-Clay, Ruth A.; Holman, Matthew J.; Falco, Emilio E.; Winn, Joshua N.; Queloz, Didier; Pepe, Francesco; Mayor, Michel; Delfosse, Xavier; Forveille, Thierryen
dc.identifier.orcidhttps://orcid.org/0000-0002-4265-047X
mit.licenseOPEN_ACCESS_POLICYen_US
mit.metadata.statusComplete


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record