Computer Science
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998kfnt...14...52g&link_type=abstract
Kinematika Fiz. Nebesn. Tel, Tom 14, No. 1, p. 52 - 66
Computer Science
Blue Galaxies: Compact Galaxies, Blue Galaxies: Star Formation, Blue Galaxies: Starbursts
Scientific paper
A sample of 36 star formation regions in 30 blue compact galaxies (BCG) from the First and Second Byurakan Surveys is studied. In these galaxies the broad absorption features are observed in the red region of the spectra. The cool stars make the main contribution to these absorption bands. The spectrophotometric observations were performed with a Ritchey-Chrétien spectrograph of the Kitt Peak Observatory 4-m telescope. An estimate is made of the stellar content metallicity in the BCG's based on the measurements of the equivalent widths of absorption bands in the integrated galactic spectra with the gas continuum and telluric absorption lines being subtracted. Burst of star formation age is estimated from the emission line Hβ equivalent width and the presence of emission and absorption features in the blue region of the spectrum. The sample has been divided into 3 groups according to the age. The massive star evolutionary models are employed in order to explain the observed difference between the metallicity at the beginning and at the end of the burst of star formation. It is due to the oxygen enrichment of the interstellar matter by several hundred of O stars.
Guseva Natalia G.
Izotov Yu. I.
Thuan Trinh Xuan
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