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dc.contributor.authorWinn, Joshua Nathan
dc.contributor.authorHolman, Matthew J.
dc.contributor.authorHenry, Gregory W.
dc.contributor.authorTorres, Guillermo
dc.contributor.authorFischer, Debra A.
dc.contributor.authorJohnson, John Asher
dc.contributor.authorMarcy, Geoffrey W.
dc.contributor.authorShporer, Avi
dc.contributor.authorMazeh, Tsevi
dc.date.accessioned2010-03-03T18:06:33Z
dc.date.available2010-03-03T18:06:33Z
dc.date.issued2009-03
dc.date.submitted2008-08
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1721.1/52014
dc.description.abstractPhotometry is presented of the 2007 December 25 transit of HD 17156b, which has the longest orbital period and highest orbital eccentricity of all the known transiting exoplanets. New measurements of the stellar radial velocity are also presented. All the data are combined and integrated with stellar-evolutionary modeling to derive refined system parameters. The planet's mass and radius are found to be 3.212[superscript +0.069] [subscript –0.082]M [subscript Jup] and 1.023[superscript +0.070] [subscript –0.055]R [subscript Jup]. The corresponding stellar properties are 1.263[superscript +0.035][subscript –0.047] M sun and 1.446[superscript +0.099] [subscript –0.067] R sun. The planet is smaller by 1σ than a theoretical solar-composition gas giant with the same mass and equilibrium temperature, a possible indication of heavy-element enrichment. The midtransit time is measured to within 1 minute and shows no deviation from a linear ephemeris (and therefore no evidence for orbital perturbations from other planets). We provide ephemerides for future transits and superior conjunctions. There is an 18% chance that the orbital plane is oriented close enough to edge-on for secondary eclipses to occur at superior conjunction. Observations of secondary eclipses would reveal the thermal emission spectrum of a planet that experiences unusually large tidal heating and insolation variations.en
dc.description.sponsorshipUnited States–Israel Binational Science Foundation (BSF)en
dc.language.isoen_US
dc.publisherAmerican Astronomical Societyen
dc.relation.isversionofhttp://dx.doi.org/10.1088/0004-637x/693/1/794en
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en
dc.sourceJosh Winnen
dc.subjectstarsen
dc.subjectplanetary systemsen
dc.titleTHE TRANSIT LIGHT CURVE PROJECT. X. A CHRISTMAS TRANSIT OF HD 17156ben
dc.typeArticleen
dc.identifier.citationThe Transit Light Curve Project. X. A Christmas Transit of HD 17156b Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Guillermo Torres, Debra Fischer, John Asher Johnson, Geoffrey W. Marcy, Avi Shporer, and Tsevi Mazeh 2009 ApJ 693 794-803 doi: 10.1088/0004-637X/693/1/794en
dc.contributor.departmentMassachusetts Institute of Technology. Department of Physicsen_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.approverWinn, Joshua Nathan
dc.contributor.mitauthorWinn, Joshua Nathan
dc.relation.journalAstrophysical Journalen
dc.eprint.versionAuthor's final manuscript
dc.type.urihttp://purl.org/eprint/type/SubmittedJournalArticleen
eprint.statushttp://purl.org/eprint/status/PeerRevieweden
eprint.grantNumber2006234en
dspace.orderedauthorsWinn, Joshua N.; Holman, Matthew J.; Henry, Gregory W.; Torres, Guillermo; Fischer, Debra; Johnson, John Asher; Marcy, Geoffrey W.; Shporer, Avi; Mazeh, Tsevien
dc.identifier.orcidhttps://orcid.org/0000-0002-4265-047X
mit.licensePUBLISHER_POLICYen
mit.metadata.statusComplete


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