Spectroscopy and Physical Properties of RR Lyrae Variable Stars

The Large sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST), Sloan Digital Sky Survey (SDSS), and the General Catalog of Variable Stars are surveys which collect data on stars within the Milky Way Galaxy. Spectra observed by LAMOST, as well as spectra observed by SDSS, were cross matched with known RR Lyrae type stars in GCVS. This provided spectral data for these variable stars. The hydrogen Balmer series is particularly important in these stars. Two different methods were used in order to link spectral properties to variability: determination of wavelength shifts due to radial velocity, and chi-square differences for changes in flux. Results showed that these methods have notable correlations to variability.