publication . Preprint . Article . Other literature type . 2017

Nuclei of dwarf spheroidal galaxies KKs 3 and ESO 269−66 and their counterparts in our Galaxy

Sharina, M. E.; Shimansky, V. V.; Kniazev, A. Y.;
Open Access English
  • Published: 26 Jun 2017
Abstract
We present the analysis of medium-resolution spectra obtained at the Southern African Large Telescope (SALT) for nuclear globular clusters (GCs) in two dwarf spheroidal galaxies (dSphs). The galaxies have similar star formation histories, but they are situated in completely different environments. ESO269-66 is a close neighbour of the giant S0 NGC5128. KKs3 is one of the few truly isolated dSphs within 10 Mpc. We estimate the helium abundance $Y=0.3$, $\rm age=12.6\pm1$ Gyr, $[Fe/H]=-1.5,-1.55\pm0.2$ dex, and abundances of C, N, Mg, Ca, Ti, and Cr for the nuclei of ESO269-66 and KKs3. Our surface photometry results using HST images yield the half-light radius of...
Subjects
arXiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics::High Energy Astrophysical Phenomena
free text keywords: Astrophysics - Astrophysics of Galaxies, Space and Planetary Science, Astronomy and Astrophysics, Interacting galaxy, Galaxy, Dwarf spheroidal galaxy, Lenticular galaxy, Physics, Astronomy, Globular cluster, Star formation, Dwarf galaxy, Astrophysics, Type-cD galaxy
Related Organizations
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