From evolved Long-Period-Variable stars to the evolution of M31

TL;DR

This paper uses long-period variable stars in M31 to estimate the galaxy's star formation history, providing insights into galaxy evolution through stellar evolution models and the analysis of LPVs.

Contribution

It introduces a method to derive the star formation history of M31 using LPVs, linking stellar luminosity to birth mass and galaxy evolution.

Findings

Constructed the mass function of LPVs in M31

Estimated the star formation history of M31

Linked LPV luminosity to stellar birth mass

Abstract

One of the ways to understand the genesis and evolution of the universe is to know how galaxies have formed and evolved. In this regard, the study of star formation history (SFH) plays an important role in the accurate understanding of galaxies. In this paper, we used long-period variable stars (LPVs) to estimate the SFH in the Andromeda galaxy (M31). These cool stars reach their peak luminosity in the final stage of their evolution; their birth mass is directly related to their luminosity. Therefore, we construct the mass function and the star formation history using stellar evolution models.