Nitrogen Enriched Quasars in the Sloan Digital Sky Survey First Data Release

Details Nitrogen Enriched Quasars in the Sloan Digital Sky Survey First Data Release Nitrogen Enriched Quasars in the Sloan Digital Sky Survey First Data Release

2004-02-09

arxiv.org/abs/astro-ph/0402205v2

Astronomy and Astrophysics

Astrophysics

Submitted to AJ - final refereed version; 18 pages, 5 figures, 3 tables

Scientific paper

10.1086/422346

The quasar Q0353-383 has long been known to have extremely strong nitrogen intercombination lines at 1486 and 1750 Angstroms, implying an anomalously high nitrogen abundance of ~15 times solar. A search for similar nitrogen-rich quasars in the Sloan Digital Sky Survey First Data Release catalog has yielded 20 candidates, including four with nitrogen emission as strong or stronger than that seen in Q0353-383. Our results indicate that only about 1 in 1700 of quasars have nitrogen abundances similar to Q0353-383, while up to 1 in 130 may be in the process of extreme nitrogen enrichment.

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