Author ORCID Identifier
Date Available
7-24-2018
Year of Publication
2018
Degree Name
Doctor of Philosophy (PhD)
Document Type
Doctoral Dissertation
College
Arts and Sciences
Department/School/Program
Physics and Astronomy
First Advisor
Dr. Ron Wilhelm
Abstract
I use single-epoch, SDSS spectroscopy of RR Lyraes identified in the Catalina survey to separate the spectra into same-temperature groups. Then I draw temperature-phase diagrams of the groups. I find shocked stars, improperly phased stars, low amplitude stars, and a few that are more likely eclipsing binaries. The RR Lyraes are then given precise metallicities by measurements of the CaII K and H-β, H-γ, and H-δ lines. This leads to better distance measurements, which allow me to confirm a distinction between the inner and outer galactic halo.
Digital Object Identifier (DOI)
https://doi.org/10.13023/etd.2018.334
Recommended Citation
Long, Stacy, "RR LYRAE CALIBRATION USING SDSS, SINGLE-EPOCH SPECTROSCOPY" (2018). Theses and Dissertations--Physics and Astronomy. 56.
https://uknowledge.uky.edu/physastron_etds/56
