Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997azh....74..536z&link_type=abstract
Astronomicheskij Zhurnal, vol. 74, p. 536
Astronomy and Astrophysics
Astronomy
Star Distribution, Compact Galaxies, Star Formation, Metallicity, Stellar Mass, Velocity Distribution, Stellar Evolution, Heavy Elements, Stellar Composition
Scientific paper
The stellar population and evolutionary characteristics (metallicity of stellar components and stellar ages and mass functions) in the blue compact galaxy SBS 1331+493 are studied. This galaxy has a low heavy-element abundance and has experienced bursts of star formation. A new method for determining the stellar composition of galaxies is proposed. This method incorporates the advantages of both evolutionary studies and population synthesis. Long-slit spectra obtained on the 4-m telescope of Kitt Peak National Observatory are used for the analysis. The resulting ages for the last burst of star formation in four consecutive spatial zones are from 3.8 x 10 exp 6 to 34 x 10 exp 6 years, corresponding to a velocity of 13 +/- 5 km/s for the corresponding wave of star formation. The metallicities of the stellar populations in different regions are from -0.96 to -0.76. The initial mass function for all the regions studied is estimated at 2.36 +/- 0.12.
Balinskaya I. S.
Knyazev Yu. A.
Lipovetskij V. A.
Zenina O. A.
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