naa a22 4500 510790402 CHVBK 20180411083317.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1134/S1063773713050046 doi (NATIONALLICENCE)springer-10.1134/S1063773713050046 Tikhonov N. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut Old stellar subsystems in dwarf galaxies [Elektronische Daten] [N. Tikhonov] Based on archival Hubble Space Telescope ACS/WFC images, we have performed stellar photometry for eight dwarf galaxies of different types (Irr, S0, E) with a populated horizontal branch on their Hertzsprung-Russell diagrams. We have identified probable RR Lyr stars in these galaxies and constructed the distribution of their number density along the minor axes of the galaxies. For comparison, similar distributions have also been constructed for red giants in the same galaxies. In all cases, the size of the subsystem of RR Lyr stars exceeds that of the subsystem of, on average, younger stars, red giants. Our results are consistent with the hypothesis about expansion of the stellar subsystems in dwarf galaxies that we suggested previously. Pleiades Publishing, Ltd., 2013 galactic photometry nationallicence stellar composition of galaxies nationallicence thin and thick disks nationallicence RR Lyr stars nationallicence Astronomy Letters SP MAIK Nauka/Interperiodica 39/5(2013-05-01), 298-305 1063-7737 39:5<298 2013 39 11443 https://doi.org/10.1134/S1063773713050046 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713050046 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Tikhonov N. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia aut NATIONALLICENCE 773 0- Astronomy Letters SP MAIK Nauka/Interperiodica 39/5(2013-05-01), 298-305 1063-7737 39:5<298 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer