Globular cluster
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The age structure of globular cluster systems in early type galaxies and its dependence on host galaxy properties
... population, consisting of an old stellar population and being sim- ilar in their basic features (e.g. see Bender & Renzini 2005, and contributions therein). However, detailed spectroscopic investi- gations of the ...
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The ACS Virgo Cluster Survey XVI Selection Procedure and Catalogs of Globular Cluster Candidates
... of globular cluster candidates for the 100 galaxies of the Advanced Camera for Surveys Virgo Cluster Survey, a large program to carry out imaging of early-type members of the Virgo Cluster ...
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The Formation of Globular Cluster Systems in Massive Elliptical Galaxies: Globular Cluster Multimodality from Radial Variation of Stellar Populations
... of Globular Cluster Systems One of the most significant developments in the study of ex- tragalactic globular cluster systems (GCSs) was the discovery of bimodality in their color ...
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CCD PHOTOMETRY OF THE GLOBULAR CLUSTER NGC 6093
... The observed frames for the standard stars in the 2006 observing season were not reliable because the filter wheel suffered an unspecified slippage during the observations, and it became impossible for us to identify the ...
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A Globular Cluster in the Dwarf Galaxy Sextans B
... It is interesting to compare the metallicities of different stellar populations in Sextans B. The metal- licity of old stars, [F e/H] = −2.1 dex, was obtained by Grebel et al. [4] via a comparison of the red giant branch ...
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Globular cluster populations in four early type Poststarburst galaxies
... the globular cluster (GC) systems of four early-type poststarburst galaxies using deep g- and I-band images from the Advanced Camera for Surveys aboard the Hubble Space ...red cluster population that ...
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New variable stars in the globular cluster NGC 5694
... globular cluster in the outer Galactic halo, at a Galactocentric distance of 29.4 kpc and a distance of 35.0 kpc from the Sun (quantities from Harris 1996, Dec. 2010 update). Ortolani & Gratton (1990) ...
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RR Lyrae Stars in the Globular Cluster NGC 6101
... Observations of NGC 6101 were taken in the V and I bands by the Faulkes Telescope South over two main seasons: one over August and September 2010 and a further season to help refine the periods in April 2011. Aperture ...
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The Globular Cluster NGC 6402 (M14) II Variable Stars
... We present time-series BV I photometry for the Galactic globular cluster NGC 6402 (M14). The data con- sists of ∼137 images per filter, obtained using the 0.9m and 1.0m SMARTS telescopes at the Cerro Tololo ...
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Normal globular cluster systems in massive low surface brightness galaxies
... the globular cluster systems of 6 massive spiral galaxies, originally cataloged as low surface brightness galaxies but here shown to span a wide range of central surface brightness values, including two ...
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THE RICH GLOBULAR CLUSTER SYSTEM OF ABELL 1689 AND THE RADIAL DEPENDENCE OF THE GLOBULAR CLUSTER FORMATION EFFICIENCY
... We study the rich globular cluster (GC) system in the center of the massive cluster of galaxies Abell 1689 (z = 0.18), one of the most powerful gravitational lenses known. With 28 Hubble Space ...
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A new search for variable stars in the globular cluster NGC 6366
... with periods between 0.5 and 3 days (Wallerstein & Cox 1984). These ranges of mass and period in- clude the classical short-period Cepheids, which led Dolphin et al. (2002) and Caputo et al. (2004) to suggest that, ...
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The two metallicity groups of the globular cluster M22: a chemical perspective
... the globular cluster M ...this cluster, in which two stellar groups are characterized by a different content in iron, neutron capture elements Y, Zr and Ba, and α element ...
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CNO and F abundances in the globular cluster M22 (NGC 6656)
... that globular clusters (GCs) are the simplest exam- ple of a stellar population (Renzini & Buzzoni 1986), that is, all their stars having the same age and chemical composition, has been challenged over the ...
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Neutrino and axion bounds from the globular cluster M5 (NGC 5904)
... in globular clusters is extended to larger brightness if the degenerate helium core loses too much energy in ‘‘dark ...Galactic globular cluster M5 (NGC 5904), allowing for a detailed comparison ...
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Confirmation of a New Metal poor Globular Cluster in the Galactic Bulge
... We use deep near-IR photometry of the VISTA Variables in the Vía Láctea ( VVV ) Survey and deep DECam Plane Survey ( DECaPS ) optical photometry to con fi rm the physical reality of the candidate globular ...
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Evolución química del cúmulo globular pobre en metales NGC 6809 = Chemical evolution of the metal poor globular cluster NGC 6809
... Galactic Globular Cluster (GGCs) is that they are a good repre- sentation, as first aproximation of what we call a simple stellar population (SSP), this terminology was suggested to highlight theoverall ...
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A spectroscopic study of the globular Cluster NGC 4147
... metal-poor globular cluster NGC 4147 based on medium- and high-resolution ...halo globular clusters in this metallicity ...The cluster contains only ∼15 per cent of stars that belong to the ...
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The globular cluster systems of Abell 1185
... old globular clusters, which are determined primarily by their metallicities, show a dependence on parent galaxy luminosity, in the sense that luminous galaxies have redder (more metal-rich) globular clus- ...
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Chemical Compositions of Field and Globular Cluster RR Lyrae Stars I NGC 3201
... the globular cluster NGC 3201, using high-resolution optical spectra collected with M2FS at ...monometallic cluster ([ Fe / H ]∼− ...other globular clusters and fi eld ...
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