Element Abundances at High Redshifts: The N/O Ratio at Low Metallicity

Details Element Abundances at High Redshifts: The N/O Ratio at Low Metallicity Element Abundances at High Redshifts: The N/O Ratio at Low Metallicity

1995-01-30

arxiv.org/abs/astro-ph/9501105v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures. Uuencoded compressed PS file. Also available at http://www.ast.cam.ac.uk/preprint/PrePrint.html

Scientific paper

Our knowledge of galactic chemical evolution is currently limited to observations of Milky Way stars and H II regions of nearby galaxies. Damped Lyman~$\alpha$ 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.

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