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.
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.
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Taxonomy
TopicsGalaxies: Formation, Evolution, Phenomena · Astronomy and Astrophysical Research · Stellar, planetary, and galactic studies