On the Nature of Damped LYα Systems: Clues from Determinations of Elemental Abundance Ratios

Details On the Nature of Damped LYα Systems: Clues from Determinations of Elemental Abundance Ratios On the Nature of Damped LYα Systems: Clues from Determinations of Elemental Abundance Ratios

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ap%26ss.263...79c&link_type=abstract

Astrophysics and Space Science, v. 263, Issue 1/4, p. 79-82 (1998).

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present a study of the [α/Fe-peak] and [N/α] abundance ratios in Damped Lyα (DLA) systems. By using ratios of undepleted elements ([S/Zn] and [N/S]) or when abundances of refractory elements are corrected by dust depletion ([Si/Fe]corr), the resulting ratios do not resemble those observed in the Galactic metal-poor stars, showing instead similarities with those ratios observed in dwarf galaxies. These results challenge the idea that these absorbers are the progenitors of the present-day spiral galaxies, and suggest an origin in low-mass galaxies for the systems up to now investigated.

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