A Technique To Derive Improved Proper Motions For Kepler Objects Of Interest

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dc.contributor.utaustinauthorBenedict, G. Fritzen_US
dc.creatorBenedict, G. Fritzen_US
dc.creatorTanner, Angelle M.en_US
dc.creatorCargile, Phillip A.en_US
dc.creatorCiardi, David R.en_US
dc.date.accessioned2016-04-22T19:46:14Z
dc.date.available2016-04-22T19:46:14Z
dc.date.issued2014-12en
dc.description.abstractWe outline an approach yielding proper motions with higher precision than exists in present catalogs for a sample of stars in the Kepler field. To increase proper-motion precision, we combine first-moment centroids of Kepler pixel data from a single season with existing catalog positions and proper motions. We use this astrometry to produce improved reduced-proper-motion diagrams, analogous to a Hertzsprung-Russell (H-R) diagram, for stars identified as Kepler objects of interest. The more precise the relative proper motions, the better the discrimination between stellar luminosity classes. Using UCAC4 and PPMXL epoch 2000 positions (and proper motions from those catalogs as quasi-Bayesian priors), astrometry for a single test Channel (21) and Season (0) spanning 2 yr yields proper motions with an average per-coordinate proper-motion error of 1.0 mas yr(-1), which is over a factor of three better than existing catalogs. We apply a mapping between a reduced-proper-motion diagram and an H-R diagram, both constructed using Hubble Space Telescope parallaxes and proper motions, to estimate Kepler object of interest K-band absolute magnitudes. The techniques discussed apply to any future small-field astrometry as well as to the rest of the Kepler field.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNASA contract NAS5-26555en_US
dc.description.sponsorshipNASA Office of Space Science NNX13AC07Gen_US
dc.description.sponsorshipNASA NNX13AC22G, NNX12AF76Gen_US
dc.description.sponsorshipNSF Astronomy and Astrophysics grant AST-1109612en_US
dc.description.sponsorshipW. M. Keck Foundationen_US
dc.identifierdoi:10.15781/T2ZR4V
dc.identifier.citationBenedict, G. Fritz, Angelle M. Tanner, Phillip A. Cargile, and David R. Ciardi. >A Technique to Derive Improved Proper Motions for Kepler Objects of Interest.> The Astronomical Journal, Vol. 148, No. 6 (Dec., 2014): 108.en_US
dc.identifier.doi10.1088/0004-6256/148/6/108en_US
dc.identifier.issn0004-6256en_US
dc.identifier.urihttp://hdl.handle.net/2152/34432
dc.language.isoEnglishen_US
dc.relation.ispartofserialAstronomical 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.subjectastrometryen_US
dc.subjectplanetary systemsen_US
dc.subjectproper motionsen_US
dc.subjectstars: distancesen_US
dc.subjecthubble-space-telescopeen_US
dc.subjectcandidate exoplanet companionen_US
dc.subjectprecisionen_US
dc.subjectradial-velocitiesen_US
dc.subjectguidance sensor 3en_US
dc.subjectsky survey 2massen_US
dc.subjectinterferometricen_US
dc.subjectastrometryen_US
dc.subjectplanet systemsen_US
dc.subjectparallaxesen_US
dc.subjectselectionen_US
dc.subjectcatalogen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleA Technique To Derive Improved Proper Motions For Kepler Objects Of Interesten_US
dc.typeArticleen_US

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