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We analyze the velocity dispersion profiles of nine open clusters in the solar neighborhood using kinematic data from Gaia DR 3, aiming to identify potential dynamical signatures of stellar-mass black holes through a comparison of…

Astrophysics of Galaxies · Physics 2025-10-28 Bingqian Ma , XiaoYing Pang , Sambaran Banerjee , Pengfei Ren , M. B. N. Kouwenhoven

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

We analyze the structural parameters of the largest-available sample of spatially resolved extragalactic globular clusters. The images of M31 GCs were found in a search of HST archival data, described in a companion paper. We measure the…

Astrophysics · Physics 2007-05-23 P. Barmby , S. Holland , J. P. Huchra

We present a study of a faint fuzzy star cluster system in the nearby SB0 galaxy NGC 5195 interacting with the famous spiral galaxy NGC 5194 (M51), based on HST ACS BVI mosaic images taken by the Hubble Heritage Team. We have found about 50…

Astrophysics · Physics 2009-11-11 Narae Hwang , Myung Gyoon Lee

We present a study of the spatial and color distributions of four early-type galaxies and their globular cluster (GC) systems observed as part of our ongoing wide-field imaging survey. We use $BVR$ KPNO-4m+MOSAIC imaging data to…

Astrophysics of Galaxies · Physics 2015-06-22 Jonathan R. Hargis , Katherine L. Rhode

We present new number density and surface brightness profiles for the globular cluster M92 (NGC 6341). These profiles are calculated from optical images collected with the CCD mosaic camera MegaCam at the Canada-France-Hawaii-Telescope and…

Solar and Stellar Astrophysics · Physics 2015-06-12 A. Di Cecco , A. Zocchi , A. L. Varri , M. Monelli , G. Bertin , G. Bono , P. B. Stetson , M. Nonino , R. Buonanno , I. Ferraro , G. Iannicola , A. Kunder , A. R. Walker

We study the quiescent ultra-diffuse galaxy FCC 224 in the Fornax cluster using Hubble Space Telescope (HST) imaging, motivated by peculiar properties of its globular cluster (GC) system revealed in shallower imaging. The surface brightness…

This paper presents an analysis of the correlation between the number of globular clusters (N_GC) in giant galaxies and the mass of the galaxies' central supermassive black hole (M_SMBH). I construct a sample of 20 elliptical, spiral, and…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Katherine L. Rhode

We present new HST/WFPC2 (V,I) photometry for the red-giant stars in NGC 5128 at a projected distance of 8 kpc from the galaxy center, which probe a mixture of its inner halo and outer bulge. The color-magnitude diagram shows an old…

Astrophysics · Physics 2009-11-07 W. E. Harris , G. L. H. Harris

To investigate the dynamical properties of globular clusters, the surface brightness and kinematic data were collected and fitted to a family of lowered isothermal models called LIMEPY models. For 18 studied globular clusters, the amounts…

Astrophysics of Galaxies · Physics 2023-01-13 Chia-Hsuan Cheng , Ing-Guey Jiang

In the three nearest luminous galaxies, the Milky Way System, the Andromeda Galaxy and NGC 5128 the brightest globular clusters are rounder than the faintest ones. On the other hand (contrary to some previous results) the flattening of…

Astrophysics · Physics 2009-11-13 Sidney van den Bergh

We investigate the old globular cluster (GC) population of 68 faint (Mv>-16 mag) dwarf galaxies located in the halo regions of nearby (<12 Mpc) loose galaxy groups and in the field environment based on archival HST/ACS images in F606W and…

Astrophysics · Physics 2009-11-13 Iskren Y. Georgiev , Thomas H. Puzia , Michael Hilker , Paul Goudfrooij

We present results from an emission code that assumes millisecond pulsars (MSPs) to be sources of relativistic particles in globular clusters (GCs) and models the resulting spectral energy distribution (SED) of Galactic GCs due to these…

High Energy Astrophysical Phenomena · Physics 2017-11-08 Hambeleleni Ndiyavala , Petrus Paulus Kruger , Christo Venter

We present recent results from our long-term Gemini/GMOS study of globular clusters in early-type galaxies. To date, we have obtained photometry and spectroscopy for clusters in NGCs 3379, 4649, 524, 7332, and IC 1459. We find a clear…

This paper explores if, and to what an extent, the stellar populations of early type galaxies can be traced through the colour distribution of their globular cluster systems. The analysis, based on a galaxy sample from the Virgo ACS data,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Juan C. Forte , E. Irene Vega , Favio R. Faifer

Using ground-based UBVRI+Halpha CCD photometry we have been carrying out a search for young massive star clusters (YMCs) in a sample consisting of 21 nearby spiral galaxies. We find a large variety concerning the richness of the cluster…

Astrophysics · Physics 2007-05-23 Soeren S. Larsen , Tom Richtler

We present the first results of a large spectroscopic survey of candidate globular clusters located in the extreme outskirts of the nearby M31 galaxy. We obtained low resolution spectra of 48 targets selected from the XSC of 2MASS, as in…

Astrophysics · Physics 2009-11-13 S. Galleti , M. Bellazzini , L. Federici , A. Buzzoni , F. Fusi Pecci

New VRI photometry is presented for the globular clusters in the innermost 140'' of the M87 halo. The results are used to discuss several issues concerning the formation and evolution of globular cluster systems in supergiant ellipticals…

Astrophysics · Physics 2009-10-30 W. E. Harris , G. L. H. Harris , D. E. McLaughlin

We report the discovery of statistically significant spatial structures in the projected two-dimensional distributions of the Globular Cluster (GC) systems of 10 among the brightest galaxies in the Fornax Cluster. We use a catalog of GCs…

Astrophysics of Galaxies · Physics 2022-03-14 Raffaele D'Abrusco , David Zegeye , Giuseppina Fabbiano , Michele Cantiello , Maurizio Paolillo , Andreas Zezas

We perform a detailed abundance analysis on integrated-light spectra of 20 globular clusters (GCs) in the early-type galaxy NGC 5128 (Centaurus A). The GCs were observed with X-Shooter on the VLT. The cluster sample spans a metallicity…

Astrophysics of Galaxies · Physics 2018-02-28 Svea Hernandez , Søren Larsen , Scott Trager , Lex Kaper , Paul Groot
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