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Stellar content of the metal-poor galaxy DDO 68

Tikhonov, N. A.; Galazutdinova, O. A.; Lebedev, V. S.

Based on archival Hubble Space Telescope ACS/WFC images, we have performed stellar photometry for the metal-poor galaxy DDO 68. The apparent distributions of stars of different ages and stellarmetallicity determinations indicate that DDO68 is a systemof two galaxies that have different stellar metallicities ( Z = 0.004 and 0.001) and are in the st…

Stellar content and distances to the isolated spiral galaxies NGC 6503 and NGC 6946

Tikhonov, N. A.

Based on archival Hubble Space Telescope images, we have performed stellar photometry of several fields in the isolated spiral galaxies NGC 6503 and NGC 6946 with high peculiar velocities. Based on the TRGB method, we have determined the distances to the galaxies: D = 6.30 ± 0.10 Mpc for NGC 6503 and D = 6.72 ± 0.15 Mpc for NGC 6946. The current s…

Stellar content of the interacting galaxies IC 1727 and NGC 672

Tikhonov, N. A.; Galazutdinova, O. A.; Lebedev, V. S.

Based on archival Hubble Space Telescope ACS/WFC images, we have performed stellar photometry for an isolated pair of interacting galaxies, IC 1727 and NGC 672, and constructed their Hertzsprung-Russell diagrams. The galaxy IC 1727 exhibits a strong asymmetry in the apparent distribution of young stars. The distribution of old stars is smoother an…