Astrophysical Bulletin

, Volume 62, Issue 3, pp 209–216

A globular cluster in the dwarf galaxy Sextans B


DOI: 10.1134/S1990341307030029

Cite this article as:
Sharina, M.E., Puzia, T.H. & Krylatyh, A.S. Astrophys. Bull. (2007) 62: 209. doi:10.1134/S1990341307030029


We present spectroscopic observations of a massive globular cluster in the dwarf irregular galaxy Sextans B, discovered by us on the Hubble Space Telescope Wide Field and Planetary Camera 2 (HST WFPC2) images. Long-slit spectra were obtained with the SCORPIO spectrograph on the 6-m telescope at the Special Astrophysical Observatory of the Russian Academy of Sciences. We determine the 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⊙), luminosity and structural parameters appear to be typical of the globular clusters in our own Galaxy. Our findings shed new light on the evolutionary history of Sextans B.

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© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  1. 1.Special Astrophysical ObservatoryRussian Academy of SciencesNizhnij ArkhyzRussia
  2. 2.Herzberg Institute of AstrophysicsVictoriaCanada
  3. 3.Astronomy department of the Kazan State UniversityKazanRussia