Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
复制标题
低纬度天体 FSR 1716 为古老球状星团的光谱确认
DOI:
10.1051/0004-6361/201731771
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发表时间:
2017
影响因子:
6.5
通讯作者:
Kunder
中科院分区:
文献类型:
--
作者:
Kunder
Star clusters are invaluable tracers of the Galactic components and the discovery and characterization of low-mass stellar systems can be used to appraise their prevailing disruption mechanisms and time scales. However, owing to significant foreground contamination, high extinction, and still uncharted interfaces of the underlying Milky Way components, objects at low Galactic latitudes are notoriously difficult to characterize. Here, we present the first spectroscopic campaign to identify the chemodynamical properties of the low-latitude star cluster FSR 1716. While its photometric age and distance are far from settled, the presence of RR Lyrae variables indicates a rather old cluster variety. Using medium-resolution (R~ 10 600) calcium triplet (CaT) spectroscopy obtained with the wide-field, multi-fiber AAOmega instrument, we identified six member candidates with a mean velocity of −30 km s-1and a velocity dispersion of 2.5 ± 0.9 km s-1. The latter value implies a dynamic mass of ~ 1.3 × 104M⊙, typical of a low-mass globular cluster. Combined with our derived CaT metallicity of −1.38 ± 0.20 dex, this object is finally confirmed as an old, metal-poor globular cluster.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
A. Mucciarelli;L. Monaco;P. Bonifacio;I. Saviane
通讯作者:
I. Saviane
DOI:
10.1111/j.1365-2966.2008.13849.x
发表时间:
2008
影响因子:
4.8
作者:
Froebrich D
通讯作者:
Froebrich D
DOI:
10.3847/2041-8213/838/1/l14
发表时间:
2017
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
D. Minniti;T. Palma;I. D'ek'any;M. Hempel;M. Rejkuba;J. Pullen;J. Alonso;R. Barb'a;B. Barbuy;E. Bica;C. Bonatto;J. Borissova;M. Catelán;J. Carballo;A. Chené;J. Clari'a;R. Cohen;Rodrigo Contreras;B. Dias;J. Emerson;D. Froebrich;A. Buckner;D. Geisler;O. Gonzalez;F. Gran;Gergely Hagdu;M. Irwin;V. Ivanov;R. Kurtev;P. Lucas;D. Majaess;F. Mauro;C. Moni;C. Navarrete;S. R. Alegr'ia;R. Saito;E. Valenti;M. Zoccali
通讯作者:
M. Zoccali
影响因子:
6.5
作者:
C. Bonatto;E. Bica
通讯作者:
E. Bica
影响因子:
6.5
作者:
C. Bonatto;E. Bica
通讯作者:
E. Bica