Computer Science
Scientific paper
Jul 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6678t&link_type=abstract
HST Proposal ID #6678
Computer Science
Hst Proposal Id #6678 Cosmology
Scientific paper
We wish to obtain GHRS UV spectra of 3 and WFPC2 V and I images of 2 of the most metal-deficient { Zsun/41 <=sssim Z <=sssim Zsun/21} blue compact galaxies {BCGs} known. These BCGs are the best candidates for nearby young primeval galaxies where massive star formation can be studied and constraints put on theories of gas collapse and fragmentation in a nearly pristine environment. Color-magnitude diagrams will constrain ages. The high resolution imaging will allow to determine the sizes, luminosities and colors of the ionizing star clusters. The absence or presence of an underlying low-surface-brightness old stellar population will tell us whether the BCG is genuinely young or not. The UV spectra will allow to examine the Ly-alpha/H Beta-O/H correlation. For galaxies with Z > 0.1 Zsun, there appears to be a correlation of increasing Ly-alpha emission with decreasing metallicity. HST has found the surprising result that the most metal-deficient BCG known, IZw18, does not have Ly-alpha emission. Is the latter suppressed in nearly primordial objects? If this is the case, Ly-alpha searches for high-redshift primeval galaxies will have to be rethought entirely.
No associations
LandOfFree
Nearby young dwarf galaxies and their Lyman Alpha emission 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 Nearby young dwarf galaxies and their Lyman Alpha emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nearby young dwarf galaxies and their Lyman Alpha emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1118180