A multiple burst accretion Model to describe the metallicity distributions and stellar mass-metallicity relation for Local Dwarf Galaxies

Abstract

A one parameter model to describe the individual metallicity distributions and stellar mass-metallicity relation for dwarf galaxies is presented. This multiple-burst model is based on an accretion scenario, accomodates the observational constraint between $\overline{z}$ and ${\sigma }_z^2$ recently established by Leaman (2012), and predicts a slope consistent with the stellar mass-metallicity relation of Kirby et al (2013) who showed that the local group dwarf spheroidal and dwarf irregular galaxies lie on the same relation. One interpretation of the model is that it describes star formation occuring either in gas rich mergers or at the intersection of colliding gas streams.

accepted for publication in the Astronomical Journal

References in corpus (2)

• The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
• Multi-Element Abundance Measurements from Medium-Resolution Spectra. II. Catalog of Stars in Milky Way Dwarf Satellite Galaxies

Cited by in corpus (3)

• A dynamical view on stellar metallicity gradient diversity across the Hubble sequence with CALIFA
• Star formation and gas flow history of a dwarf irregular galaxy traced by gas-phase and stellar metallicities
• What do planetary nebulae and H II regions reveal about the chemical evolution of nearby dwarf galaxies?