Multicolour photometry of pulsating stars in the Galactic Bulge fields

TL;DR

This study analyzes multicolour photometry of crowded stellar fields in the Galactic Bulge, identifying and classifying pulsating stars using OGLE-II data across four passbands to understand their properties at various distances.

Contribution

It provides new multicolour photometric data and classification of pulsating stars in the Galactic Bulge, enhancing understanding of their properties in crowded fields.

Findings

Identification of pulsating stars in the Galactic Bulge

Photometric measurements in four passbands for variable stars

Classification of variable stars based on multicolour data

Abstract

We present a study of photometric properties of very crowded stellar fields toward the Galactic Bulge. We performed a search for pulsating stars among thousands of variable stars from the OGLE-II survey supplementing the variability study with photometric measurements in four Johnson-Cousins $UBVI_{\rm C}$ passbands. Using these data, we analysed the properties of objects located at different distances and, whenever possible, classified them.