The N/O abundance ratio in the lowest-metallicity blue compact dwarf galaxies

Details The N/O abundance ratio in the lowest-metallicity blue compact dwarf galaxies The N/O abundance ratio in the lowest-metallicity blue compact dwarf galaxies

2001-09-27

arxiv.org/abs/astro-ph/0109519v1

Astronomy and Astrophysics

Astrophysics

Proceedings of the XVII IAP Colloquium "Gaseous Matter in Galaxies and Intergalactic Space"

Scientific paper

The results of the N/O abundance determination in a sample of low-metallicity blue compact dwarf (BCD) galaxies based on new spectroscopic observations with large telescopes (Keck, VLT, MMT, 4m KPNO) are presented. We show that the N/O abundance ratio is constant at lowest metallicities < Zsun/20, confirming previous findings and strongly supporting the origin of nitrogen as a primary element.

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