# Stellar population synthesis of galaxies with chemical evolution model

## TL;DR

This paper introduces a chemical evolution model to improve the accuracy of stellar population analysis in galaxies by addressing the age-metallicity degeneracy, linking metallicity history with star formation history.

## Contribution

It integrates a chemical evolution model into stellar population fitting to better constrain galaxy star formation histories.

## Key findings

- Successfully tested on local dwarf galaxies
- Improves constraints on star formation histories
- Links metallicity evolution with star formation

## Abstract

The derivation of accurate stellar populations of galaxies is a non-trivial task because of the well-known age-metallicity degeneracy. We aim to break this degeneracy by invoking a chemical evolution model(CEM) for isolated disk galaxy, where its metallicity enrichment history(MEH) is modelled to be tightly linked to its star formation history(SFH). Our CEM has been successfully tested on several local group dwarf galaxies whose SFHs and MEHs have been both independently measured from deep color-magnitude diagrams of individual stars. By introducing the CEM into the stellar population fitting algorithm as a prior, we expect that the SFH of galaxies could be better constrained.