The physical conditions and oxygen and nitrogen abundance of 36 SBS galaxies from the SDSS DR7
Abstract
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.
- Publication:
-
Multiwavelength AGN Surveys and Studies
- Pub Date:
- July 2014
- DOI:
- 10.1017/S1743921314003226
- Bibcode:
- 2014IAUS..304...34G
- Keywords:
-
- surveys;
- galaxies: active;
- galaxies: Seyfert;
- galaxies: starburst