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dc.contributor.authorGettel, Sara
dc.contributor.authorCharbonneau, David
dc.contributor.authorDressing, Courtney D.
dc.contributor.authorBuchhave, Lars A.
dc.contributor.authorDumusque, Xavier
dc.contributor.authorVanderburg, Andrew Michael
dc.contributor.authorBonomo, Aldo S.
dc.contributor.authorMalavolta, Luca
dc.contributor.authorPepe, Francesco
dc.contributor.authorCameron, Andrew Collier
dc.contributor.authorLatham, David Winslow
dc.contributor.authorUdry, Stéphane
dc.contributor.authorMarcy, Geoffrey W.
dc.contributor.authorIsaacson, Howard
dc.contributor.authorHoward, Andrew W.
dc.contributor.authorDavies, Guy R.
dc.contributor.authorAguirre, Victor Silva
dc.contributor.authorKjeldsen, Hans
dc.contributor.authorBedding, Timothy R.
dc.contributor.authorLopez, Eric
dc.contributor.authorAffer, Laura
dc.contributor.authorCosentino, Rosario
dc.contributor.authorFigueira, Pedro
dc.contributor.authorFiorenzano, Aldo F. M.
dc.contributor.authorHarutyunyan, Avet
dc.contributor.authorJohnson, John Asher
dc.contributor.authorLopez-Morales, Mercedes
dc.contributor.authorLovis, Christophe
dc.contributor.authorMayor, Michel
dc.contributor.authorMicela, Giusi
dc.contributor.authorMolinari, Emilio
dc.contributor.authorMotalebi, Fatemeh
dc.contributor.authorPhillips, David F.
dc.contributor.authorPiotto, Giampaolo
dc.contributor.authorQueloz, Didier
dc.contributor.authorRice, Ken
dc.contributor.authorSasselov, Dimitar D.
dc.contributor.authorSégransan, Damien
dc.contributor.authorSozzetti, Alessandro
dc.contributor.authorWatson, Chris
dc.contributor.authorBasu, Sarbani
dc.contributor.authorCampante, Tiago L.
dc.contributor.authorChristensen-Dalsgaard, Jørgen
dc.contributor.authorKawaler, Steven D.
dc.contributor.authorMetcalfe, Travis S.
dc.contributor.authorHandberg, Rasmus
dc.contributor.authorLund, Mikkel N.
dc.contributor.authorLundkvist, Mia S.
dc.contributor.authorHuber, Daniel
dc.contributor.authorChaplin, William J.
dc.date.accessioned2017-02-22T20:21:32Z
dc.date.issued2016
dc.identifier.citationGettel, Sara, David Charbonneau, Courtney D. Dressing, Lars A. Buchhave, Xavier Dumusque, Andrew Vanderburg, Aldo S. Bonomo, et al. 2016. The Kepler-454 System: A Small, Not-rocky Inner Planet, a Jovian World, and a Distant Companion. The Astrophysical Journal 816, no. 2: 95. doi:10.3847/0004-637x/816/2/95.en_US
dc.identifier.issn1538-4357en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:30410812
dc.description.abstractKepler-454 (KOI-273) is a relatively bright (V = 11.69 mag), Sun-like star that hosts a transiting planet candidate in a 10.6 day orbit. From spectroscopy, we estimate the stellar temperature to be 5687 ± 50 K, its metallicity to be [m/H] = 0.32 ± 0.08, and the projected rotational velocity to be v sin i < 2.4 km s−1. We combine these values with a study of the asteroseismic frequencies from short cadence Kepler data to estimate the stellar mass to be ${1.028}_{-0.03}^{+0.04}{M}_{\odot }$, the radius to be 1.066 ± 0.012 R⊙, and the age to be ${5.25}_{-1.39}^{+1.41}$ Gyr. We estimate the radius of the 10.6 day planet as 2.37 ± 0.13 R⊕. Using 63 radial velocity observations obtained with the HARPS-N spectrograph on the Telescopio Nazionale Galileo and 36 observations made with the HIRES spectrograph at the Keck Observatory, we measure the mass of this planet to be 6.8 ± 1.4 M⊕. We also detect two additional non-transiting companions, a planet with a minimum mass of 4.46 ± 0.12 MJ in a nearly circular 524 day orbit and a massive companion with a period >10 years and mass >12.1 MJ. The 12 exoplanets with radii <2.7 R⊕ and precise mass measurements appear to fall into two populations, with those <1.6 R⊕ following an Earth-like composition curve and larger planets requiring a significant fraction of volatiles. With a density of 2.76 ± 0.73 g cm−3, Kepler-454b lies near the mass transition between these two populations and requires the presence of volatiles and/or H/He gas.en_US
dc.description.sponsorshipAstronomyen_US
dc.language.isoen_USen_US
dc.publisherAmerican Astronomical Societyen_US
dc.relation.isversionofdoi:10.3847/0004-637x/816/2/95en_US
dc.relation.hasversionhttps://arxiv.org/pdf/1511.09097.pdfen_US
dash.licenseOAP
dc.titleThe Kepler-454 System: A Small, Not-rocky Inner Planet, a Jovian World, and a Distant Companionen_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalThe Astrophysical Journalen_US
dash.depositing.authorCharbonneau, David
dc.date.available2017-02-22T20:21:32Z
dc.identifier.doi10.3847/0004-637x/816/2/95*
dash.authorsorderedfalse
dash.contributor.affiliatedVanderburg, Andrew
dash.contributor.affiliatedLatham, David
dash.contributor.affiliatedPhillips, David
dash.contributor.affiliatedJohnson, John
dash.contributor.affiliatedSasselov, Dimitar
dash.contributor.affiliatedCharbonneau, David


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