The Population of Weak MG II Absorbers

Details The Population of Weak MG II Absorbers The Population of Weak MG II Absorbers

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.8404r&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #84.04; Bulletin of the American Astronomical Society, Vol. 29, p.1349

Astronomy and Astrophysics

Astronomy

Scientific paper

We have found 30 weak (0.02 < W_r(2796) < 0.3 { Angstroms}) Mg\kern 0.1emii absorption systems in an unbiased survey of 26 quasars over the redshift range 0.4 = 0.9 is dN/dz= 1.7+/- 0.1; thus, they comprise the bulk ( ~ 65%) of all Mg\kern 0.1emii absorbers. Fe\kern 0.1emii was detected in 11 of the systems. The Fe\kern 0.1emii to Mg\kern 0.1emii column density ratios range from super--solar to below 0.1 solar, indicating that the alpha --group to iron--group enrichment processes are varied among weak Mg\kern 0.1emii systems. These weak systems represent a new population of Mg\kern 0.1emii absorbers in that the associated luminous objects they select are unknown. In contrast, strong Mg\kern 0.1emii absorbers (W_r > 0.3 { Angstroms}) are known to select the population of normal galaxies. Weak Mg\kern 0.1emii systems may select some combination of normal galaxy outskirts, ejected or tidally stripped material, and low surface brightness galaxies. In particular, those systems with high iron--group abundances could select out the population of ``giant'' low surface brightness galaxies.

Affiliated with

Also associated with

No associations

Rating

The Population of Weak MG II Absorbers 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 The Population of Weak MG II Absorbers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Population of Weak MG II Absorbers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1176011