Photometric differences between modulated and non-Blazhko RRab Lyrae stars in the Galactic bulge

TL;DR

This study compares light curve properties of modulated and non-modulated RRab Lyrae stars in the Galactic bulge, revealing key differences in their pulsation characteristics and distribution.

Contribution

It provides a comprehensive analysis of over 8000 RRab stars, highlighting specific photometric differences related to the Blazhko effect.

Findings

Blazhko stars have shorter pulsation periods

Blazhko stars exhibit less skewed mean light curves

Blazhko stars have lower mean amplitudes and larger rise-times

Abstract

We present our results of searching for differences in light curves of modulated and non-modulated RRab stars in the Galactic bulge. We examined a sample of more than 8000 stars. The most important results are that Blazhko stars have shorter pulsation periods, less skewed mean light curves, lower mean amplitudes, larger rise-time, no difference in spatial distribution and metallicity.