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dc.contributor.advisorFrinchaboy, Peter M., III
dc.contributor.authorSpoo, Tayloren_US
dc.date.accessioned2021-12-07T14:35:13Z
dc.date.available2021-12-07T14:35:13Z
dc.date.created12/6/2021en_US
dc.date.issued2021en_US
dc.identifier.urihttps://repository.tcu.edu/handle/116099117/49750
dc.description.abstractThrough the use of large-scale surveys, astronomers are able to investigate Galactic evolution, both kinematically and chemically, however determining reliable stellar ages has been elusive. Surveys that provide high resolution spectroscopy can offer various elemental abundances in stellar populations of clusters and can be further used to constrain stellar ages. Using data from the Open Cluster Abundances and Mapping (OCCAM) survey, based on the SDSS/APOGEE-2 survey, we created a empirical relationship between open cluster stellar ages and the carbon-to-nitrogen ([C/N]) ratio abundances for evolved stars, primarily red giant branch stars. We explore how mixing effects in different stellar phases, like the red clump, affect the derived calibration. The [C/N]-age calibration cluster sample covers a wider range of ages and metallicities than previous calibrations and updates the calibration for the improved APOGEE DR17 abundance calibration. We verify that this [C/N]-age calibration is also consistent with astroseismic ages derived from Kepler photometry.en_US
dc.format.mediumFormat: Onlineen_US
dc.language.isoenen_US
dc.relation.ispartofTCU Master Thesisen_US
dc.subjectAstrophysicsen_US
dc.titleCalibrating [C/N] Abundance Ratios Using Star Clusters To Determine Stellar Agesen_US
dc.typeTexten_US
etd.degree.departmentDepartment of Physics and Astronomy
etd.degree.levelMaster
local.collegeCollege of Science and Engineering
local.departmentPhysics and Astronomy
dc.type.genreThesis
local.subjectareaPhysics and Astronomy
etd.degree.nameMaster of Science


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