Deep near infrared photometry of new Galactic globular clusters

Citation
Vd. Ivanov et al., Deep near infrared photometry of new Galactic globular clusters, ASTRON ASTR, 362(2), 2000, pp. L1-L4
Citations number
14
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
362
Issue
2
Year of publication
2000
Pages
L1 - L4
Database
ISI
SICI code
0004-6361(200010)362:2<L1:DNIPON>2.0.ZU;2-H
Abstract
We present a preliminary report on the first deep infrared photometry of 2M ASS GC01 and 2MASS GC02 (GC01 and GC02 hereafter) - new Galactic globular c luster (GC) candidates, discovered by the 2MASS. They both appear to be gen uine disk GCs though highly obscured. The location of the two GCs suggests that they are metal rich - [Fe/H]similar to -0.5. We estimated their distan ce and reddening using the It, - band bright ness of the red giant branch ( RGB) bump, and J - K-s color of the RGB at M-K = -3 mag: D = 3.1 +/- 0.5, 3 .9 +/- 0.6 kpc, and A(V) = 20.9 +/- 0.7, 17.2 +/- 1.2 mag, for GC01 and GC0 2 respectively. Variation in the metal abundance can change our results wit hin 30 - 35%.