1995/01/30 by K Lipman, Lipman, K, M Pettini +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9501105
7 pages, 3 figures. Uuencoded compressed PS file. Also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html
arxiv created 1995/01/30 · arxiv updated 2009/12/01
Our knowledge of galactic chemical evolution is currently limited to observations of Milky Way stars and H II regions of nearby galaxies. Damped Lyman~α systems offer a new approach for tracking the evolution of normal galaxies from early epochs to the present day. Here we report the first measurements of nitrogen abundances in galaxies with less than 1/100 of solar metallicity, a range unexplored by previous observations.