Spectroscopic Study of a Large Sample of Galaxies Discovered in the Second Byurakan Survey Fields

Details Spectroscopic Study of a Large Sample of Galaxies Discovered in the Second Byurakan Survey Fields Spectroscopic Study of a Large Sample of Galaxies Discovered in the Second Byurakan Survey Fields

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap.....46..131g&link_type=abstract

Astrophysics (English translation of Astrofizika), v. 46, Issue 2, p. 131-143 (2003).

Statistics

Galaxies - Uv-Excess Galaxies - Emission - Line Galaxies Statistics

Scientific paper

The Second Byurakan Survey (SBS) is a well known combined survey, which uses the presence of UV-excess radiation in the continuum, or the presence of emission-lines in the spectra for the identification of active and star-forming galaxies. This paper reports on a comparative study of 77 galaxies identified with UV-excess, and 34 galaxies identified via emission-line techniques in the fields of the SBS. The spectroscopic parameters used for the comparison are the [OII]3727/H and [OIII]5007/H emission-lines ratios, the equivalent widths of [OII]3727, [OIII]5007 and H emission-lines, and the C [OII]-C H index. Spectroscopic parameters as well as new redshifts were determined from the spectra obtained with the 6m telescope of the Special Astrophysical Observatory (Russia). The main results are: 1) Galaxies discovered via UV-excess technique are preferably more active. 2) Galaxies discovered via emission-line technique are preferably high-excitation low-luminosity star-forming galaxies. 3) UV-excess galaxies with faintest UV-excess radiation are likely candidates to be LINER or Sy2 type objects.

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