Abundance of nitrogen in the early Galaxy from the NH band at 336nm

Details Abundance of nitrogen in the early Galaxy from the NH band at 336nm Abundance of nitrogen in the early Galaxy from the NH band at 336nm

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..590s&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

Stellar Abundances

Scientific paper

In the frame of the ESO Large Program ""First Stars"" spectra of about 40 extremely metal-poor giants ([Fe/H]<-2.7) have been obtained with UVES at the VLT in the range 330-900 nm. The behaviour of nitrogen at low metallicity is up to now badly known. We present here a first estimation of the nitrogen abundance in these extremely metal-poor stars from a synthesis of the spectrum in the region of the NH band between 336 and 337nm. The trend of [N/Fe] but also of [C+N/Fe] versus metallicity are presented and discussed.

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