We present spectroscopic observations of a massive globular cluster in the dwarf irregular galaxy Sextans B, discovered by us on Hubble Space Telescope Wide Field and Planetary Camera 2 (HST WFPC2) images. Long-slit spectra were obtained with the SCORPIO spectrograph on the the 6-m telescope at the Special Astrophysical observatory of the Russian Academy of Sciences. We determine age, metallicity and alpha-element abundance ratio for the globular cluster to be 2±1 Gyr, −1.35±0.25 dex, and 0.1±0.1 dex, respectively. Main photometric and structural parameters of it were determined using our surface photometry on the HST images. The mass (∼105M\sun), luminosity and structural parameters appear to be typical for the globular clusters in our own Galaxy. Our findings shed a new light on the evolutionary history of Sextans B.
@article{arxiv.0704.3908,
title = {A globular cluster in the dwarf galaxy Sextans B},
author = {M. E. Sharina and Th. H. Puzia and A. S. Krylatyh},
journal= {arXiv preprint arXiv:0704.3908},
year = {2009}
}