Spectroscopy of Galaxies in Selected Fields of the Second Byurakan Survey

Panoramic spectroscopy of galaxies with star-formation regions. a study of SBS 1202 + 583

“…The ratios f p R play a basic role in our classification scheme [5], which was developed for uniform processing of spectral data, especially for the purpose of distinguishing galaxies with nuclear (AGN) or star formation (SfG) activity, even when these indicators are faint. In studying SfG galaxies we are, in particular, interested in a range of values The width of the interval which they encompass is 0.11-0.23, despite the fact that this, the ratio of the sum of the two lines to Hα, is almost the same as for 1 1 R .…”

“…This included galaxies with extended morphologies that were chosen as active from seven selected fields of the SBS [4]. The objects were classified according to our scheme for spectral classification [5], as adapted to the available data and standard classification criteria. This yielded 345 galaxies (more than 70% of the sample) with confirmed signs of star formation activity.…”

“…Galaxies with star formation activity are denoted by SfG (Star forming Galaxies) in our classification scheme [5]. For simplicity, the sample is divided into two subclasses, depending on the equivalent width of the Å, which includes the objects with greater current star formation: blue compact galaxies, HII galaxies, etc.…”

2D spectroscopy of galaxies with star formation regions. Study of SBS 1533+574

“…have been used for the spectral classification of these objects [3]. The 345 galaxies with confirmed signs of nuclear or star formation activity constitute our basic sample, ~90% of the galaxies of which are, according to the scheme used in Ref.…”

“…The 345 galaxies with confirmed signs of nuclear or star formation activity constitute our basic sample, ~90% of the galaxies of which are, according to the scheme used in Ref. 3, classified as SfG (star-forming galaxy), i.e., galaxies with signs of star formation activity. A substantial fraction of the SfG galaxies in the sample, 314, and the rather wide range of red shifts, 0 < z < 0.07, ensure that the sample is representative, both from the standpoint of a multiplicity of morphological types and from the standpoint of the phases of star formation activity in which they exist.…”