Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-11-22
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
2 pages, 2 figures, to appear in the proceedings of JENAM 2010, Symposium 2 "Environment and the Formation of Galaxies: 30 yea
Scientific paper
We study stellar population parameters of a sample of 13 dwarf galaxies located in poor groups of galaxies using high resolution spectra observed with VIMOS at the ESO-VLT. LICK-indices were compared with Simple Stellar Population models to derive ages, metallicities and [alpha/Fe]-ratios. Comparing the dwarfs with a sample of giant ETGs residing in comparable environments we find that the dwarfs are on average younger, less metal-rich, and less enhanced in alpha-elements than giants. Age, Z, and [alpha/Fe] ratios are found to correlate both with velocity dispersion and with morphology. We also find possible evidence that low density environment (LDE) dwarfs experienced more prolonged star formation histories than Coma dwarfs, however, larger samples are needed to draw firm conclusions.
Annibali Francesca
Bressan Alberto
Grützbauch Ruth
Rampazzo Roberto
Zeilinger Werner W.
No associations
LandOfFree
Nature and nurture of early-type dwarf galaxies in low density environments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Nature and nurture of early-type dwarf galaxies in low density environments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nature and nurture of early-type dwarf galaxies in low density environments will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-657796