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The physical conditions and oxygen and nitrogen abundance of 36 SBS galaxies from the SDSS DR7

Published online by Cambridge University Press:  25 July 2014

M. V. Gyulzadyan  and
V. Z. Adibekyan
M. V. Gyulzadyan
Affiliation:
Byurakan Astrophysical Observatory, Armenia email: mgyulz@bao.sci.am
V. Z. Adibekyan
Affiliation:
Centro de Astrofisica da Universidade do Porto, Portugal
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Abstract

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Physical conditions and oxygen and nitrogen abundances in 36 SBS UV-excess and/or emission-line galaxies from the SDSS DR7 were determined. We have found that SBS 0808+578 is AGN. The others are HII galaxies or HII regions in galaxies. For all objects the oxygen abundance 12+log(O/H) lies in the range of 7.85 ÷ 8.61 and log(N/O) ratio in the range of −1.45 ÷ −0.4. They occupy the same area in the diagram N/O O/H as the high-excitation HII regions. We found no extremely metal-deficient galaxy. Using H-alpha fluxes star formation rates (SFR) for our samples galaxies were determined. Determined SFRs, being in the range of 0.001 ÷ 6 o year−1, are similar of that observed in typical star forming regions in spiral and irregular galaxies.

Keywords

surveys — galaxies: active — galaxies: Seyfert — galaxies: starburst
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S304: Multiwavelength AGN Surveys and Studies , October 2013 , pp. 34 - 35
Copyright
Copyright © International Astronomical Union 2014 

References

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