SCYON Abstract

Received on October 29 2007

FSR0190 - Another old distant galactic cluster

AuthorsD. Froebrich (1), H. Meusinger (2) and C.J. Davis (3)
Affiliation(1) University of Kent
(2) Thueringer Landessternwarte Tautenburg
(3) Joint Astronomy Center
Accepted byMonthly Notices of the Royal Astronomical Society
Contactdf@star.kent.ac.uk
URLhttp://astro.kent.ac.uk/~df/
Links

Abstract

We are conducting a large program to classify newly discovered Milky Way star cluster candidates from Froebrich et al. (2007). Here we present NIR follow-up observations of FSR0190 (RA=20h05m31.3s, DEC=33deg34'09", J2000). The cluster is situated close to the Galactic Plane (l=70.7302deg, b=+0.9498deg). It shows a circular shape, a relatively large number of core helium burning stars -- which clearly distinguishes the cluster from the rich field -- but no centrally condensed star density profile. We derive an age of more than 7Gyr, a Galactocentric distance of 10.5kpc, a distance of 10kpc from the Sun, and an extinction of AK = 0.8mag. The estimated mass is at least of the order of 105M(sun), and the absolute brightness is MV ≤ -4.7mag; both are rather typical properties for Palomar-type globular clusters.