%0 Journal Article
%T A new isolated dSph galaxy near the Local Group
%A I. D. Karachentsev
%A L. N. Makarova
%A D. I. Makarov
%A R. B. Tully
%A L. Rizzi
%J Physics
%D 2014
%I arXiv
%R 10.1093/mnrasl/slu181
%X Observations of the highly isolated dwarf spheroidal galaxy KKs 3 = [KK2000] 03 with the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) are presented. We measured the galaxy distance of $2.12\pm0.07$ Mpc using the Tip of Red Giant Branch (TRGB) method. The total blue absolute magnitude of the galaxy is estimated as $M_B = -10.8$ mag. We briefly discuss the star formation history of KKs 3 derived from its colour-magnitude diagram. According to our calculation, the total stellar mass of the galaxy is $2.3\times10^7M_{\odot}$, and most stars (74\%) were formed at an early epoch more than 12 Gyr ago. A full description of the properties of the colour-magnitude diagram requires some extension of star formation in metallicity and age.
%U http://arxiv.org/abs/1411.1674v1