# Metals in M33

## TL;DR

This paper investigates the metallicity distribution in galaxy M33 using spectroscopic data, revealing an off-center peak and updating a chemical evolution model with recent findings.

## Contribution

It provides a detailed metallicity map of M33 and refines the galaxy's chemical evolution model based on new spectroscopic and gradient data.

## Key findings

- Metallicity gradients are consistent across different emission-line populations.
- An off-center metallicity peak is identified in the southern arm.
- The chemical evolution model of M33 is updated with recent observational results.

## Abstract

The metal content of the spiral galaxy M33 is analyzed through spectroscopic observations of its emission-line populations, H ii regions and Planetary Nebulae (PNe): their abundance gradients are identical within the errors. The 2D metallicity map is presented, finding an off-center peak, located in the southern arm. A chemical evolution model of M33 described by Magrini et al. (2007a) is updated at the light of recent results on the Schmidt law and the metallicity gradients.