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

TY - JOUR

T1 - ESO 546-G34

T2 - the most-metal-poor, low surface brightness galaxy?

AU - Mattsson, Lars

AU - Pilyugin, L.S.

AU - Bergvall, Nils

PY - 2011/7

Y1 - 2011/7

N2 - 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 LSBG found in the local Universe. Furthermore, we find 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 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.

AB - 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 LSBG found in the local Universe. Furthermore, we find 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 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.

U2 - 10.1111/j.1745-3933.2011.01077.x

DO - 10.1111/j.1745-3933.2011.01077.x

M3 - Journal article

SN - 0035-8711

VL - 415

SP - L54-L58

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

IS - 1

ER -