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

(2) W. M. Keck Observatory; (3) MMT Observatory; (4) Universit\"ats-Sternwarte; (5) National Optical Astronomy Observatories; (6) University of Virginia; C. Foltz (3); Charlottesville; F. Chaffee (2); Germany; Goettingen

arxiv: astro-ph/0109519 · v1 · submitted 2001-09-27 · 🌌 astro-ph

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

Y. Izotov (1) , F. Chaffee (2) , C. Foltz (3) , K. Fricke (4) , R. Green (5) , N. Guseva (1) , K. Noeske (4) , P. Papaderos (4)

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T. Thuan (6) ((1) Main Astronomical Observatory Kyiv Ukraine (2) W. M. Keck Observatory USA (3) MMT Observatory Tucson (4) Universit\"ats-Sternwarte Goettingen Germany (5) National Optical Astronomy Observatories (6) University of Virginia Charlottesville USA)

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keywords abundancebluecompactdwarfgalaxiesratioconfirmingconstant

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

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