A Misaligned Prograde Orbit For Kepler-13 Ab Via Doppler Tomography

dc.contributor.utaustinauthorJohnson, Marshall C.en_US
dc.contributor.utaustinauthorCochran, William D.en_US
dc.creatorJohnson, Marshall C.en_US
dc.creatorCochran, William D.en_US
dc.creatorAlbrecht, Simonen_US
dc.creatorDodson-Robinson, Sarah E.en_US
dc.creatorWinn, Joshua N.en_US
dc.creatorGullikson, Kevinen_US
dc.date.accessioned2016-04-28T19:35:21Z
dc.date.available2016-04-28T19:35:21Z
dc.date.issued2014-07en
dc.description.abstractTransiting planets around rapidly rotating stars are not amenable to precise radial velocity observations, such as are used for planet candidate validation, as they have wide, rotationally broadened stellar lines. Such planets can, however, be observed using Doppler tomography, wherein stellar absorption line profile distortions during transit are spectroscopically resolved. This allows the validation of transiting planet candidates and the measurement of the stellar spin-planetary orbit (mis) alignment, which is an important statistical probe of planetary migration processes. We present Doppler tomographic observations that provide direct confirmation of the hot Jupiter Kepler-13 Ab and also show that the planet has a prograde, misaligned orbit with lambda = 58 degrees.6 +/- 2 degrees.0. Our measured value of the spin-orbit misalignment is in significant disagreement with the value of lambda = 23 degrees +/- 4 degrees previously measured by Barnes et al. (2011) from the gravity-darkened Kepler light curve. We also place an upper limit of 0.75 M-circle dot (95% confidence) on the mass of Kepler-13 C, the spectroscopic companion to Kepler-13 B, which is the proper-motion companion of the planet host star Kepler-13 A.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNASA Earth and Space Science Fellowship NNX12AL59Hen_US
dc.description.sponsorshipNASA Origins of Solar Systems Program NNX11AC34Gen_US
dc.description.sponsorshipNSF 1108595, AST-1055910en_US
dc.description.sponsorshipNASA Origins programen_US
dc.description.sponsorshipKepler Participating Scientist programen_US
dc.identifierdoi:10.15781/T2DR58
dc.identifier.Filename2014_07_kepler13ab.pdfen_US
dc.identifier.citationJohnson, Marshall C., William D. Cochran, Simon Albrecht, Sarah E. Dodson-Robinson, Joshua N. Winn, and Kevin Gullikson. "A Misaligned Prograde Orbit for Kepler-13 Ab via Doppler Tomography." The Astrophysical Journal, Vol. 790, No. 1 (Jul., 2014): 30.en_US
dc.identifier.doi10.1088/0004-637x/790/1/30en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34831
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectline: profilesen_US
dc.subjectplanetary systemsen_US
dc.subjectplanets and satellites: individualen_US
dc.subject(kepler-13 ab)en_US
dc.subjecttechniques: spectroscopicen_US
dc.subjectstellar atmosphere modelsen_US
dc.subjecthobby-eberly telescopeen_US
dc.subjectlimb-darkening lawen_US
dc.subjecthot jupiteren_US
dc.subjectdifferential rotationen_US
dc.subjectexoplanetary systemsen_US
dc.subjectplanetaryen_US
dc.subjectcandidatesen_US
dc.subjecttidal dissipationen_US
dc.subjectsurface gravitiesen_US
dc.subjectspin axesen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleA Misaligned Prograde Orbit For Kepler-13 Ab Via Doppler Tomographyen_US
dc.typeArticleen_US

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