ESO 546-G34: the most-metal-poor, low surface brightness galaxy?

Details ESO 546-G34: the most-metal-poor, low surface brightness galaxy? ESO 546-G34: the most-metal-poor, low surface brightness galaxy?

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.415l..54m&link_type=abstract

Monthly Notices of the Royal Astronomical Society: Letters, Volume 415, Issue 1, pp. L54-L58.

Astronomy and Astrophysics

Astronomy

1

Ism: Abundances, H Ii Regions, Galaxies: Dwarf, Galaxies: Individual: Eso 546-G34

Scientific paper

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.

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