Element Abundances at High Redshifts: The N/O Ratio at Low Metallicity
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
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.
7 pages, 3 figures. Uuencoded compressed PS file. Also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html
7 pages, 3 figures. Uuencoded compressed PS file. Also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html