Near-infrared photometry and spectroscopy of the low Galactic latitude globular cluster 2MASS-GC 03
| Autor: | T. Palma, J. Borissova, V. Villanueva, Maximiliano Moyano, Ch. Moni Bidin, Leigh C. Smith, Dante Minniti, R. Kurtev, Javier Alonso-García, N. Medina, Michael A. Kuhn, Julio A. Carballo-Bello, S. Ramírez Alegría, P. W. Lucas, I. Dékány |
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| Rok vydání: | 2016 |
| Předmět: |
Vista Variables in the Via Lactea
Milky Way PROPER MOTIONS FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences DISK 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics STAR-CLUSTERS 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics Physics 010308 nuclear & particles physics Galactic Center Astronomy Astronomy and Astrophysics VVV SURVEY EVOLUTION Galaxy GALAXY Photometry (astronomy) Star cluster Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science DISCOVERY Globular cluster HALO MILKY-WAY Astrophysics::Earth and Planetary Astrophysics SKY SURVEY Open cluster |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 462:501-510 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stw1674 |
| Popis: | 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 +- 1.2Gyr strengthens the case for its globular-cluster nature. The cluster has a hint of elongation in the direction of the Galactic center. Comment: Accepted for publication, MNRAS |
| Databáze: | OpenAIRE |
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