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Related papers: Globular Clusters around Galaxies in Groups

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We present the serendipitous discovery of 195 extragalactic globular clusters (GCs) in one of the deepest optical images ever obtained, a 126 orbit HST/ACS imaging study of the nearby Galactic GC NGC 6397. The distant GCs are all found…

Astrophysics · Physics 2009-11-13 Jasonjot S. Kalirai , Jay Strader , Harvey B. Richer , Jay Anderson

We report on the discovery of an extended stellar halo surrounding the distant Galactic globular cluster NGC 5694, based on new deep (V ~ 24.5) wide-field (24' * 20') photometry acquired with VIMOS at VLT. Stars with colour and magnitude…

Solar and Stellar Astrophysics · Physics 2015-05-28 M. Correnti , M. Bellazzini , E. Dalessandro , A. Mucciarelli , L. Monaco , M. Catelan

We present a photometric study of the globular cluster (GC) system associated to the lenticular galaxy (S0) NGC 6861, which is located in a relatively low density environment. It is based on GEMINI/GMOS images in the filters g', r', i' of…

Astrophysics of Galaxies · Physics 2015-06-23 Carlos G. Escudero , Favio R. Faifer , Lilia P. Bassino , Juan Pablo Calderon , Juan Pablo Caso

The relation between the Ultra Compact Objects (UCOs) recently discovered in the Fornax cluster (Drinkwater et al. 2000, Hilker et al. 1999) and the brightest globular clusters associated with the central galaxy NGC 1399 has been…

Astrophysics · Physics 2009-11-07 Steffen Mieske , Michael Hilker , Leopoldo Infante

We investigate the kinematics of a combined sample of 74 globular clusters around NGC 1399. Their high velocity dispersion, increasing with radius, supports their association with the gravitational potential of the galaxy cluster rather…

We present results from a study of the globular cluster (GC) systems of four spiral and S0 galaxies imaged as part of an ongoing wide-field survey of the GC systems of giant galaxies. The target galaxies -- the SB0 galaxy NGC1023, the SBb…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Michael D. Young , Jessica L. Dowell , Katherine L. Rhode

We present a study of globular clusters in the inner region of the giant elliptical galaxy NGC 4472, based on the HST WFPC2 archive data. We have found about 1560 globular cluster candidates at the galactocentric radius r < 4 arcmin.…

Astrophysics · Physics 2009-10-31 Myung Gyoon Lee , Eunhyeuk Kim

In this paper we present the results of a wide-field imaging study of the globular cluster (GC) system of the field S0 galaxy NGC 7457. To derive the global properties of the GC system, we obtained deep BVR images with the WIYN 3.5 m…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Jonathan R. Hargis , Katherine L. Rhode , Jay Strader , Jean P. Brodie

We investigate the shallow increase in globular cluster half-light radii with projected galactocentric distance $R_{gc}$ observed in the giant galaxies M87, NGC 1399, and NGC 5128. To model the trend in each galaxy, we explore the effects…

We performed spectroscopy of globular clusters associated with NGC 1399 and measured radial velocities of more than 400 clusters, the largest sample ever obtained for dynamical studies. In this progress report, we present the sample and the…

We present new imaging measurements of 27 individual globular clusters in the halo of the nearby elliptical galaxy NGC 5128, obtained with the Hubble Space Telescope STIS and WFPC2 cameras. Combining these with similar data for selected…

Astrophysics · Physics 2009-11-07 W. E. Harris , G. L. H. Harris , S. T. Holland , D. E. McLaughlin

We have discovered three globular clusters beyond the Holmberg radius in Hubble Space Telescope Advanced Camera for Surveys images of the gas-rich dark matter dominated blue compact dwarf galaxy NGC2915. The clusters, all of which start to…

We have investigated a number of globular cluster candidates from a recent wide-field study by Harris et al. (2004a) of the giant elliptical galaxy NGC 5128. We used the Magellan I telescope + MagIC camera under excellent seeing (0.3"-0.6")…

Astrophysics · Physics 2009-11-11 M. Gomez , D. Geisler , W. E. Harris , T. Richtler , G. L. H. Harris , K. Woodley

We report on the radial velocity measurements of 18 globular clusters and one dE galaxy in the field of the giant elliptical galaxy NGC 1399, the dominant galaxy of the Fornax cluster. We present also the radial velocity measurements of…

Astrophysics · Physics 2009-10-30 Dante Minniti , Markus Kissler-Patig , Paul Goudfrooij , Georges Meylan

We examine the luminosity and B-I color distribution of globular clusters for three early-type galaxies in the Fornax cluster using imaging data from the Wide Field/Planetary Camera 2 on the Hubble Space Telescope. The luminosity functions…

Astrophysics · Physics 2009-10-30 Carl J. Grillmair , Duncan A. Forbes , Jean P. Brodie , Rebecca Elson

We present wide-field multiband photometry of globular cluster (GC) systems in NGC 1399, NGC 1404, and NGC 1387 located at the central region of the Fornax galaxy cluster. Observation was carried out through U, B, V, and I bands, which…

Astrophysics of Galaxies · Physics 2015-06-12 Hak-Sub Kim , Suk-Jin Yoon , Sangmo Tony Sohn , Sang Chul Kim , Eunhyeuk Kim , Chul Chung , Sang-Yoon Lee , Young-Wook Lee

We investigate the spatial distribution of the Intra-Cluster Globular Clusters (ICGCs) detected in the core of the Fornax galaxy cluster. By separately modeling different components of the observed population of Globular Clusters (GCs), we…

Model surface brightness profiles based on Fokker-Planck simulations have been used to assess the high resolution surface brightness profile of the globular cluster NGC 6397 of Lauzeral et al. (1992). The profile is well fitted by the model…

Astrophysics · Physics 2015-06-24 G. A. Drukier

We report the first results from an imaging program with the ACS camera on HST designed to measure the structural characteristics of a wide range of globular clusters in NGC 5128, the nearest giant elliptical galaxy. From 12 ACS/WFC fields,…

We present the largest sample ($\sim$13,000 candidates, $\sim$3000 of wich are bona-fide candidates) of globular cluster (GCs) candidates reported in the Fornax Cluster so far. The survey is centered on the NGC 1399 galaxy, extending out to…