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dc.contributor.authorBallard, Sarah
dc.contributor.authorChaplin, William J.
dc.contributor.authorCharbonneau, David
dc.contributor.authorDésert, Jean-Michel
dc.contributor.authorFressin, Francois
dc.contributor.authorZeng, Li
dc.contributor.authorWerner, Michael W.
dc.contributor.authorDavies, Guy R.
dc.contributor.authorAguirre, Victor Silva
dc.contributor.authorBasu, Sarbani
dc.contributor.authorChristensen-Dalsgaard, Jørgen
dc.contributor.authorMetcalfe, Travis S.
dc.contributor.authorStello, Dennis
dc.contributor.authorBedding, Timothy R.
dc.contributor.authorCampante, Tiago L.
dc.contributor.authorHandberg, Rasmus
dc.contributor.authorKaroff, Christoffer
dc.contributor.authorElsworth, Yvonne
dc.contributor.authorGilliland, Ronald L.
dc.contributor.authorHekker, Saskia
dc.contributor.authorHuber, Daniel
dc.contributor.authorKawaler, Steven D.
dc.contributor.authorKjeldsen, Hans
dc.contributor.authorLund, Mikkel N.
dc.contributor.authorLundkvist, Mia
dc.date.accessioned2017-01-17T19:20:01Z
dc.date.issued2014
dc.identifier.citationBallard, Sarah, William J. Chaplin, David Charbonneau, Jean-Michel Désert, Francois Fressin, Li Zeng, Michael W. Werner, et al. 2014. Kepler-93b: A Terrestrial World Measured to Within 120 Km, and a Test Case for a New Spitzer Observing Mode. The Astrophysical Journal 790, no. 1: 12. doi:10.1088/0004-637x/790/1/12.en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:29991582
dc.description.abstractWe present the characterization of the Kepler-93 exoplanetary system, based on three years of photometry gathered by the Kepler spacecraft. The duration and cadence of the Kepler observations, in tandem with the brightness of the star, enable unusually precise constraints on both the planet and its host. We conduct an asteroseismic analysis of the Kepler photometry and conclude that the star has an average density of 1.652 ± 0.006 g cm–3. Its mass of 0.911 ± 0.033 M ☉ renders it one of the lowest-mass subjects of asteroseismic study. An analysis of the transit signature produced by the planet Kepler-93b, which appears with a period of 4.72673978 ± 9.7 × 10–7 days, returns a consistent but less precise measurement of the stellar density, 1.72$^{+0.02}_{-0.28}$ g cm–3. The agreement of these two values lends credence to the planetary interpretation of the transit signal. The achromatic transit depth, as compared between Kepler and the Spitzer Space Telescope, supports the same conclusion. We observed seven transits of Kepler-93b with Spitzer, three of which we conducted in a new observing mode. The pointing strategy we employed to gather this subset of observations halved our uncertainty on the transit radius ratio RP /R sstarf. We find, after folding together the stellar radius measurement of 0.919 ± 0.011 R ☉ with the transit depth, a best-fit value for the planetary radius of 1.481 ± 0.019 R ⊕. The uncertainty of 120 km on our measurement of the planet's size currently renders it one of the most precisely measured planetary radii outside of the solar system. Together with the radius, the planetary mass of 3.8 ± 1.5 M ⊕ corresponds to a rocky density of 6.3 ± 2.6 g cm–3. After applying a prior on the plausible maximum densities of similarly sized worlds between 1 and 1.5 R ⊕, we find that Kepler-93b possesses an average density within this group.en_US
dc.description.sponsorshipAstronomyen_US
dc.language.isoen_USen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofdoi:10.1088/0004-637X/790/1/12en_US
dc.relation.hasversionhttps://arxiv.org/pdf/1405.3659.pdfen_US
dash.licenseLAA
dc.subjecteclipsesen_US
dc.subjectmethods: observationalen_US
dc.subjectplanetary systemsen_US
dc.subjectstars: individual (KOI 69 KIC 3544595)en_US
dc.titleKepler-93b: A Terrestrial World Measured to Within 120 Km, and a Test Case for a New Spitzer Observing Modeen_US
dc.typeJournal Articleen_US
dc.description.versionAuthor's Originalen_US
dc.relation.journalThe Astrophysical Journalen_US
dash.depositing.authorCharbonneau, David
dc.date.available2017-01-17T19:20:01Z
dc.identifier.doi10.1088/0004-637X/790/1/12*
dash.authorsorderedfalse
dash.identifier.orcid0000-0003-1957-6635en_US
dash.contributor.affiliatedZeng, Li
dash.contributor.affiliatedCharbonneau, David
dc.identifier.orcid0000-0003-1957-6635


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