High-Resolution Abundance Analysis of Stars with Small Planets Discovered by Kepler

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dc.contributor.advisorSimon Schuler
dc.contributor.advisorZachary A. Vaz
dc.contributor.authorDrake C. Williams
dc.date.accessioned2018-02-21T19:42:54Z
dc.date.available2018-02-21T19:42:54Z
dc.date.issued2015
dc.descriptionRecommended Citation: Williams, Drake C. . “High-Resolution Abundance Analysis of Stars with Small Planets Discovered by Kepler.” Acta Spartae, 2015. https://doi.org/10.48497/5DNP-B094.
dc.description.abstractUsing high-resolution, high signal-to-noise ratio Keck/HIRES spectra we have derived the parameters and abundances of 17elements of four planetary host stars discovered by Kepler: Kepler-97, Kepler-128, Kepler-131, and Kepler-411. All four stars are known to host small planets (from 0.8 to 1.8 Earth radii), and densities have been determined for planets in two of the systems. We find the metallicities of the stars to range from [Fe/H] = −0.17to [Fe/H]= +0.13 (on a scale where the Sun has a metallicity of [Fe/H]= 0.00). This suggests that small planet formation occurs over a wide range of metallicities, in contrast to large, Jupiter-size planets which have been shown to form preferentially in high-metallicity environments. In addition, our four stars are found to have elemental abundances which fall along trends defined by a large sample of stars within the disk of the Galaxy. Based on this result, small planets appear to form around stars that have compositions typical of the general Galactic population. The detailed compositions of these host stars, along with densities of small planets, will provide important constraints for models of small planet formation.en_US
dc.identifier.citationWilliams, Drake C. . “High-Resolution Abundance Analysis of Stars with Small Planets Discovered by Kepler.” Acta Spartae, 2015. https://doi.org/10.48497/5DNP-B094.
dc.identifier.doihttps://doi.org/10.48497/5dnp-b094
dc.identifier.urihttp://hdl.handle.net/20.500.11868/270
dc.language.isoen_USen_US
dc.publisherCollege of Natural and Health Sciences, The University of Tampaen_US
dc.subjectDepartment of Psychologyen_US
dc.subjectDepartment of Physicsen_US
dc.subjectKepleren_US
dc.subjectStarsen_US
dc.subjectPlanetsen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCESen_US
dc.titleHigh-Resolution Abundance Analysis of Stars with Small Planets Discovered by Kepleren_US
dc.typeArticleen_US

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Volume 1, No. 1, 2015