Open AccessESO 546−G34: the most‐metal‐poor, low surface brightness galaxy?
Author(s) -
Mattsson Lars,
Pilyugin Leonid S.,
Bergvall Nils
Publication year - 2011
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2011.01077.x
Subject(s) - galaxy , surface brightness , astrophysics , universe , brightness , luminosity , physics , metallicity , astronomy
ABSTRACT We present a re‐analysis of spectroscopic data for 23 H ii 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 LSBG found in the local Universe. Furthermore, we find evidence that blue, metal‐poor LSBGs, together with blue compact galaxies (BCGs) and many other H ii galaxies, fall outside the regular luminosity–metallicity relation. This suggests that there might be an evolutionary connection between LSBGs and BCGs. In such cases, several very metal poor LSBGs should exist in the local Universe.