Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-05-25
Astronomy and Astrophysics
Astrophysics
4 pages, to appear in the proceedings of IAUC198: Near-Field Cosmology with Dwarf Elliptical Galaxies, Helmut Jerjen and Bruno
Scientific paper
10.1017/S1743921305003704
We present a study of the evolution of late-type field dwarfs over the last ~ 1.9 Gyr, based on HST ACS observations carried out as part of the GEMS survey. This study is amongst the first to probe the evolution of dwarfs over such a large timescale. The comparison of structural properties, particularly size and scale length, indicates that the dwarfs in the redshift range z ~ 0.01 to 0.15 (look-back times up to 1.9 Gyr) are more extended than local dwarfs. We argue that this difference is due to the star formation activity becoming more centrally concentrated in late-type dwarfs over the last ~ 1.9 Gyr. We discuss several possible causes for this evolution. We also find a lack of blue compact dwarfs in the GEMS sample and interpret this as indicative of the fact that strong, centrally concentrated star formation is a feature of evolved dwarfs that are entering their final stages of evolution.
Barazza Fabio D.
Jogee Shardha
No associations
LandOfFree
Evolution of Field Dwarf Galaxies with GEMS 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 Evolution of Field Dwarf Galaxies with GEMS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Field Dwarf Galaxies with GEMS will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-642360