Near-infrared photometry and spectroscopy of the low Galactic latitude globular cluster 2MASS-GC03

Julio A. Carballo-Bello, S. Ramirez Alegria, J. Borissova, L. C. Smith, R. Kurtev, P. W. Lucas, Ch Moni Bidin, J. Alonso-Garcia, D. Minniti, T. Palma, I. Dekany, N. Medina, M. Moyano, V. Villanueva, M. A. Kuhn

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We present deep near-infrared photometry and spectroscopy of the globular cluster 2MASS-GC03 projected in the Galactic disk using MMIRS on the Clay telescope (Las Campanas Observatory) and VISTA Variables in the Via Lactea survey (VVV) data. Most probable cluster member candidates were identified from near-infrared photometry. Out of ten candidates that were followed-up spectroscopically, five have properties of cluster members, from which we calculate = -0.9 +/- 0.2 and a radial velocity of v_r > = -78 +- 12km/s. A distance of 10.8kpc is estimated from 3 likely RRLyrae members. Given that the cluster is currently at a distance of 4.2kpc from the Galactic center, the cluster's long survival time of an estimated 11.3 +/- 1.2 Gyr strengthens the case for its globular-cluster nature. The cluster has a hint of elongation in the direction of the Galactic center.
Original languageEnglish
Pages (from-to)501-510
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Early online date13 Jul 2016
Publication statusPublished - 11 Oct 2016


  • astro-ph.SR
  • globular clusters: individual


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