metallicity. We also find that the local metallicity is probably independent on the local star formation rate surface density at a fixed $M_*$ and $\Sigma_*$. Our results are consistent with the scenario that the local metallicities in galaxies are shaped by the combination of the local stars formed in the history and the metal loss caused by galactic winds.'
author:
- 'Yulong Gao, Enci Wang, Xu Kong, Zesen Lin, Guilin Liu, Haiyang Liu, Qing Liu, Ning Hu, Berzaf Berhane Teklu, Xinkai Chen, and Qinyuan Zhao'
bibliography:
- 'ms.bib'
title: 'What determines the local metallicity of galaxies: global stellar mass, local stellar mass surface density or star formation rate?'
---

Introduction {#sec:intro}
============

The chemical processes of the gas and stars in galactic environments is of key importance in understanding the formation and evolution of galaxies, and the metallicity of the interstellar medium ($Z$), along with its relationship with other galactic properties, is a fundamental probe. The observed metallicity is a result of the interplay between the enrichment from previous generations of stars, the metal loss caused by winds from stars and active galactic nuclei (AGN), and the dilution by metal-poor gas inflows. In spite of the investigation for the chemical 