English

Whiting 1: a new Halo Young Globular Cluster

Astrophysics 2009-11-10 v1

Abstract

We report on BVIBVI CCD photometry of a field centered in the region of the Galactic star cluster Whiting~1 down to V=23.0V=23.0. This cluster has never been studied insofar, and we provide for the first time estimates of its fundamental parameters, namely, radial extent, age, distance and reddening. Whiting~1 turns out to be a compact star cluster with a diameter of about 1^{\prime}. We find that the cluster is about 5 Gyr old and has a probable metal abundance around [Fe/H]= -1.20. Its position at b=60o.64b=-60^{o}.64 and at a heliocentric distance of about 45 kpc makes the cluster a rather strange object, surely not a disk old open cluster, but perhaps the youngest halo Globular Cluster insofar known.

Keywords

Cite

@article{arxiv.astro-ph/0501465,
  title  = {Whiting 1: a new Halo Young Globular Cluster},
  author = {Giovanni Carraro},
  journal= {arXiv preprint arXiv:astro-ph/0501465},
  year   = {2009}
}

Comments

16 pages, 7 eps figure, accepted for publication as ApJ Letter