QSO absorption lines and the time scale for initial heavy element enrichment in galaxies

Details QSO absorption lines and the time scale for initial heavy element enrichment in galaxies QSO absorption lines and the time scale for initial heavy element enrichment in galaxies

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333l...5s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 333, Oct. 1, 1988, p. L5-L8. SERC-supported research.

Astronomy and Astrophysics

Astrophysics

52

Absorption Spectra, Galaxies, Heavy Elements, Line Spectra, Quasars, Cosmology, H I Regions, Lyman Spectra, Red Shift

Scientific paper

Recent statistical studies of the incidence of C IV, Mg II, and Lyman limit absorption in QSO spectra reveal that the ratio of the number density of heavy element absorbers to that of H I absorbers in declining rapidly with increasing redshift beyond z ≡ 1. The authors assume that this trend is due to the effects of initial heavy element enrichment in the outer parts of galaxies. They then find that the heavy element abundance increases linearly with time from t = 1.5 billion years to t = 4 billion years (q0 = 1/2, H0 = 50), roughly on the dynamical time scale at these large radii. On a simple "closed box" model, the rate of gas consumption is roughly constant.

Affiliated with

Also associated with

No associations

Rating

QSO absorption lines and the time scale for initial heavy element enrichment in 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 QSO absorption lines and the time scale for initial heavy element enrichment in galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QSO absorption lines and the time scale for initial heavy element enrichment in galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1598240