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Stellar population of the irregular galaxy IC 10

Tikhonov, N. A.; Galazutdinova, O. A.

Based on our observations with the 6-m BTA telescope at the Special Astrophysical Observatory, the Russian Academy of Sciences, and archival Hubble Space Telescope images, we have performed stellar photometry for several regions of the irregular galaxy IC 10, a member of the Local Group. Distance moduli with a median value of m - M = 24.47, D = 78…

Stellar content of the interacting galaxies of the M51 system

Tikhonov, N. A.; Galazutdinova, O. A.; Tikhonov, E. N.

Based on archival Hubble Space Telescope ACS/WFC images, we have performed stellar photometry for more than 0.6 million stars in the interacting galaxies NGC 5194 and NGC 5195 of the M51 system. Stars of various ages have been identified on the constructed Hertzsprung-Russell diagram: blue and red supergiants, AGB stars, and red giants. The distan…

Star formation history in the central region of the barred galaxy NGC 4245

Afanasiev, V. L.; Chilingarian, I. V.; Sil'Chenko, O. K.

We have investigated the gas and stellar kinematics and the stellar population properties at the center of the early-type galaxy NGC 4245 with a large-scale bar by the method of two-dimensional spectroscopy. The galaxy has been found to possess a pronounced chemically decoupled compact stellar nucleus, which is at least a factor of 2.5 richer in m…