Other
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999iaus..192..259b&link_type=abstract
The stellar content of Local Group galaxies, Proceedings of the 192nd symposium of the International Astronomical Union held in
Other
Scientific paper
We have obtained U-band photometry of 2500 stars, and BV-band photometry of 3540 stars in the field centered on the HII regions in the northeast sector of the dwarf irregular galaxy IC 1613, a member of the Local Group. From the (B-V, Mv) color-magnitude and theoretical H-R diagrams the ages of the stellar populations have been determined. The stellar populations in three groups are separated: youngest stars with an age about 5 Myr, intermediate stars with age 200--400 Myr and old stars with ages up to 10 Gyr. The slope of IMF for blue stars is Gamma = -2.02 ± 0.09, which is similar to the other nearby galaxies. The stellar content of the OB associations has been investigated including nine Hodge associations and several new ones, determined by cluster analysis. Comparison between OB associations within and outside the gas nebulae shows a signature of a presence of two wave of star formation. The total U, B and V magnitude of eight Hodge open clusters were given. The six new possible nonstellar objects were reported. Most probably they are distant galaxies visible through the disk of IC 1613, which confirm Baade's original suggestion that there are no bright globular clusters in the IC 1613.
Borissova Jordanka
Georgiev Lachezar
Ivanov Georgy
Koenigsberger Gloria
Kurtev Radostin
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