Deep near infrared photometry of new Galactic globular clusters

Ivanov, VD; Borissova, J.; Vanzi L.

Abstract

We present a preliminary report on the first deep infrared photometry of 2MASS GC01 and 2MASS GC02 (GC01 and GC02 hereafter) - new Galactic globular cluster (GC) candidates, discovered by the 2MASS. They both appear to be genuine 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 distance 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 GC02 respectively. Variation in the metal abundance can change our results within 30 - 35%.

Más información

Título según WOS: Deep near infrared photometry of new Galactic globular clusters
Título según SCOPUS: Deep near infrared photometry of new Galactic globular clusters
Título de la Revista: ASTRONOMY & ASTROPHYSICS
Volumen: 362
Número: 2
Editorial: EDP SCIENCES S A
Fecha de publicación: 2000
Página de inicio: L1
Página final: L4
Idioma: English
Notas: ISI, SCOPUS