Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-03-21
Astrophys.J. 574 (2002) 51-58
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ. 12 pages including 4 figures and 2 tables
Scientific paper
10.1086/340934
We use deep HST STIS and NICMOS images of three spectroscopically confirmed galaxy counterparts of high-redshift damped Ly-alpha (DLA) absorbers (one of which is a new discovery) to test the hypothesis that high-redshift DLA galaxies are Lyman-break galaxies. If this hypothesis is correct the emission properties of DLA galaxies must lie within the range of emission properties measured for Lyman-break galaxies of similar absolute magnitude. This will be true regardless of selection biases in the sample of detected DLA galaxies. We test this prediction using several emission properties: half-light radius, radial profile (Sersic n parameter), optical-to-near-infrared colour, morphology, Ly alpha emission equivalent width, and Ly alpha emission velocity structure. In all cases the measured values for the DLA galaxies lie within the range measured for the population of Lyman-break galaxies. None of the measurements is in conflict with the prediction. We conclude that the measured emission properties of the three DLA galaxies studied here are consistent with the conjecture that high-redshift DLA galaxies are Lyman-break galaxies. We show that this result does not conflict with the observation that the few high-redshift DLA galaxies discovered are mostly fainter than spectroscopically confirmed L* Lyman-break galaxies.
Fall Michael S.
Fynbo Johan U.
Jakobsen Peter
Møller Palle
Warren Stephen J.
No associations
LandOfFree
Are high-redshift DLA galxies Lyman-break galaxies? 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 Are high-redshift DLA galxies Lyman-break galaxies?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are high-redshift DLA galxies Lyman-break galaxies? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-665491