ESO 546-G34: The most metal poor LSB galaxy?
Cosmology and Nongalactic Astrophysics
2015-03-19 v1
Abstract
We present a re-analysis of spectroscopic data for 23 HII-regions in 12 blue, metal-poor low surface brightness galaxies (LSBGs) taking advantage of recent developments in calibrating strong-line methods. In doing so we have identified a galaxy (ESO 546-G34) which may be the most metal-poor LSB galaxy found in the local Universe. Furthermore, we see evidence that blue metal-poor LSBGs, together with blue compact galaxies (BCGs) and many other HII galaxies, fall outside the regular luminosity-metallicity relation. This suggests there might be an evolutionary connection between LSBGs and BCGs. In such case, several very metal-poor LSBGs should exist in the local Universe.
Keywords
Cite
@article{arxiv.1105.3650,
title = {ESO 546-G34: The most metal poor LSB galaxy?},
author = {Lars Mattsson and Leonid S. Pilyugin and Nils Bergvall},
journal= {arXiv preprint arXiv:1105.3650},
year = {2015}
}
Comments
5 pages, 3 figures. Accepted for publication in MNRAS Letters