SCYON Abstract

Received on March 14 2007

FSR1735 - A new globular cluster candidate in the inner Galaxy

AuthorsD. Froebrich (1), H. Meusinger (2), and A. Scholz (3)
Affiliation(1) University of Kent
(2) Thüringer Landessternwarte Tautenburg
(3) University of St. Andrews
Accepted byMonthly Notices of the Royal Astronomical Society
Contactdf@star.kent.ac.uk
URLhttp://astro.kent.ac.uk/~df/
Links

Abstract

We carry out a large program to classify newly discovered star clusters from Froebrich et al. (2006) in the inner Galaxy. Here, we present a first analysis of a new high-priority globular cluster candidate, FSR1735 at l=339.1879; b=-1.8534, based on new deep near infrared observations from Sofi at the NTT. A significant peak in the K-band luminosity function is found, which is interpreted as the clump of post-He-flash stars. The distance and the reddening of the cluster are determined to 9.1 kpc and AK = 0.5 mag, respectively, the metallicity is estimated to [M/H] = -0.8. Radial star density profiles are used to measure the core radius and the tidal radius of the cluster. The lack of signs for on-going star formation and the position in the Galaxy pose strong arguments against the interpretation of this object as a young or old open cluster. All the observational evidence is in agreement with the interpretation that FSR1735 is a so far unknown globular cluster in the inner Galaxy.