Detection of the Long Period Variable Stars of And II Dwarf Satellite galaxy

TL;DR

This study catalogs long period variable stars in And II, a dwarf satellite galaxy of Andromeda, using optical observations to analyze stellar evolution and distance measurements.

Contribution

It provides the first extensive catalog of LPV stars in And II, including updated galaxy parameters and a new distance estimate based on Sobel filter analysis.

Findings

Catalog of LPV stars in And II created

Distance modulus estimated between 23.90 and 24.11 mag

Insights into stellar evolution in dwarf galaxies

Abstract

We conducted an extensive study of the spheroidal dwarf satellite galaxies around the Andromeda galaxy to produce an extensive catalog of LPV stars. The optical monitoring project consists of 55 dwarf galaxies and four globular clusters that are members of the Local Group. We have made observations of these galaxies using the WFC mounted on the 2.5 m INT in nine different periods, both in the i-band filter Sloan and in the filter V-band Harris. We aim to select AGB stars with brightness variations larger than 0.2 mag to investigate the evolutionary processes in these dwarf galaxies. The resulting catalog of LPV stars in Andromeda's satellite galaxies offers updated information on features like half-light radii, TRGB magnitudes, and distance moduli. This manuscript will review the results obtained for And II galaxy. Using the Sobel filter, we have calculated the distance modulus for this satellite galaxy, which ranges from 23.90 to 24.11 mag.