Presentation #204.15 in the session Pulsating Variable Stars — iPoster Session.
Using large, modern surveys of data, we revisit the metallicity calibration of RR Lyrae variables from properties of their lightcurves. Analysis of APOGEE2 visit-level spectra has been calibrated to ASPCAP values to obtain reliable [Fe/H] values for RR Lyrae stars. A systematic and robust Fourier analysis of TESS lightcurves from both short- and long-cadence data has also been performed. High-resolution spectra from a large survey combined with high precision and cadence photometry from a space-based telescope gives us an excellent dataset for determining metallicities of RR Lyrae from lightcurve properties. This calibration, coupled with the all-sky coverage of TESS, means we will be able to trace metallicities in the APOGEE2 scale from every Galactic population using these variables