Low-luminosity Kepler red giants analysis

Using oscillation mode frequencies extracted from each star, we apply Bayesian optimization to estimate {Delta}{Pi}1 from the power spectrum of the stretched-period spectrum and to perform the subsequent forward modeling of the mixed-mode frequencies.

With our measurements, we show that the mode coupling factor q shows significant anticorrelation with both the stellar mass and metallicity, and can reveal highly metal-poor stars. We present the evolution of {epsilon}g up the lower giant branch up to before the luminosity bump, and find no significant trends in {epsilon}g or {delta}{nu}rot with the stellar mass and metallicity in our sample. Additionally, we identify six new red giants showing anomalous distortions in their g-mode pattern.