Globular Clusters Old and Young in NGC 5128 (Centaurus A)

2006 ◽  
pp. 129-132
Author(s):  
Eric W. Peng ◽  
Holland C. Ford ◽  
Kenneth C. Freeman
Keyword(s):  
Globular Clusters ◽  
Centaurus A

scholarly journals Twins born in different environments? Nuclei of two dSphs: isolated galaxy KKS3 and E269-66, a close neighbor of NGC5128

2015 ◽  
Vol 12 (S316) ◽  
pp. 349-350
Author(s):  
Margarita Sharina ◽  
Alexei Kniazev ◽  
Igor Karachentsev
Keyword(s):  
Globular Clusters ◽  
Massive Star ◽  
Stellar Population ◽  
Central Star ◽  
Close Neighbor ◽  
Dwarf Spheroidal Galaxies ◽  
Star Forming ◽  
Star Formation Histories ◽  
Massive Clusters ◽  
Centaurus A

AbstractWe present the results of age, metallicity and radial velocity determination for central massive globular clusters (GCs) in dwarf spheroidal galaxies: KKs3 and ESO269-66. KKS3 is a unique isolated galaxy. ESO269-66 is a close neighbor of the giant S0 Centaurus A. The results contribute to the knowledge about the origin of massive star clusters and their host dSphs. The structure and star formation histories of the two dwarf galaxies look rather similar. Both of them have experienced several star-forming events. The most recent ones occurred 1-2 Gyr ago, and most powerful bursts happened 12-14 Gyrs ago. Our analysis has shown that both GCs appear to be 1-2 Gyr younger and 0.1-0.3 dex more metal-rich than the most ancient metal-poor stars in the host dSphs. We examine signatures of multiple stellar population in the GCs using our data. Since central star-forming bursts were extended in time, the massive clusters might be considered as nuclei of the galaxies.

scholarly journals LUMINOSITY FUNCTIONS OF LMXBs IN CENTAURUS A: GLOBULAR CLUSTERS VERSUS THE FIELD

2009 ◽  
Vol 701 (1) ◽  
pp. 471-480 ◽  
Author(s):  
Rasmus Voss ◽  
Marat Gilfanov ◽  
Gregory R. Sivakoff ◽  
Ralph P. Kraft ◽  
Andrés Jordán ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Luminosity Functions ◽  
Centaurus A

scholarly journals Chemical abundances of globular clusters in NGC 5128 (Centaurus A)

2018 ◽  
Vol 476 (4) ◽  
pp. 5189-5215 ◽  
Author(s):  
Svea Hernandez ◽  
Søren Larsen ◽  
Scott Trager ◽  
Lex Kaper ◽  
Paul Groot
Keyword(s):  
Globular Clusters ◽  
Chemical Abundances ◽  
Centaurus A

scholarly journals Globular Clusters and X‐Ray Point Sources in Centaurus A (NGC 5128)

2008 ◽  
Vol 682 (1) ◽  
pp. 199-211 ◽  
Author(s):  
Kristin A. Woodley ◽  
Somak Raychaudhury ◽  
Ralph P. Kraft ◽  
William E. Harris ◽  
Andrés Jordán ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Point Sources ◽  
X Ray ◽  
Centaurus A

scholarly journals The Newtonian and MOND dynamical models of NGC 5128: Investigation of the dark matter contribution

2016 ◽  
pp. 9-20 ◽  
Author(s):  
S. Samurovic
Keyword(s):  
Dark Matter ◽  
Globular Clusters ◽  
Velocity Dispersion ◽  
Good Description ◽  
Isotropic Case ◽  
Dark Halo ◽  
Dynamical Models ◽  
Anisotropic Case ◽  
Early Type Galaxy ◽  
Centaurus A

We study the well-known nearby early-type galaxy NGC 5128 (Centaurus A) and use the sample of its globular clusters to analyze its dynamics. We study both Newtonian and MOND models assuming three cases of orbital anisotropies: isotropic case, mildly tangentially anisotropic case and the radially anisotropic case based on the literature. We find that there are two regions with different values of the velocity dispersion: interior to ~ 3 effective radii the value of the velocity dispersion is approximately 150 km s?1 , whereas beyond ~ 3 effective radii its value increases to approximately 190 km s?1 , thus implying the increase of the total cumulative mass which is indicative of the existence of dark matter there in the Newtonian approach: the mass-to-light increases from M/LB = 7 in the inner regions to M/LB = 26 in the outer regions. We found that the Navarro-Frenk-White (NFW) model with dark halo provides good description of the dynamics of NGC 5128. Using three MOND models (standard, simple and toy), we find that they all provide good fits to the velocity dispersion of NGC 5128 and that no additional dark component is needed in MOND.

EIGHT HUNDRED NEW CANDIDATES FOR GLOBULAR CLUSTERS IN NGC 5128 (Centaurus A)

2012 ◽  
Vol 143 (4) ◽  
pp. 84 ◽  
Author(s):  
Gretchen L. H. Harris ◽  
Matías Gómez ◽  
William E. Harris ◽  
Kyle Johnston ◽  
Farnoud Kazemzadeh ◽  
...  
Keyword(s):  
Globular Clusters ◽  
Centaurus A

scholarly journals Low-Mass X-Ray Binaries and Globular Clusters in Centaurus A

2007 ◽  
Vol 671 (2) ◽  
pp. L117-L120 ◽  
Author(s):  
Andrés Jordán ◽  
Gregory R. Sivakoff ◽  
Dean E. McLaughlin ◽  
John P. Blakeslee ◽  
Daniel A. Evans ◽  
...  
Keyword(s):  
Globular Clusters ◽  
X Ray ◽  
Low Mass ◽  
X Ray Binaries ◽  
Centaurus A

scholarly journals THE LOST DWARFS OF CENTAURUS A AND THE FORMATION OF ITS DARK GLOBULAR CLUSTERS

2016 ◽  
Vol 832 (1) ◽  
pp. 88 ◽  
Author(s):  
Mia Sauda Bovill ◽  
Thomas H. Puzia ◽  
Massimo Ricotti ◽  
Matthew A. Taylor
Keyword(s):  
Globular Clusters ◽  
Centaurus A

scholarly journals Globular Clusters in the Inner Regions of NGC 5128 (Centaurus A)

1996 ◽  
Vol 467 ◽  
pp. 221 ◽  
Author(s):  
Dante Minniti ◽  
M. Victoria Alonso ◽  
Paul Goudfrooij ◽  
Pascale Jablonka ◽  
Georges Meylan
Keyword(s):  
Globular Clusters ◽  
Centaurus A

scholarly journals Masses and M/L Ratios of Bright Globular Clusters in NGC 5128

2007 ◽  
Vol 3 (S246) ◽  
pp. 418-422
Author(s):  
M. Rejkuba ◽  
P. Dubath ◽  
D. Minniti ◽  
G. Meylan
Keyword(s):  
Globular Clusters ◽  
Velocity Dispersion ◽  
Local Group ◽  
Structural Parameters ◽  
Elliptical Galaxy ◽  
Radial Velocities ◽  
Velocity Dispersions ◽  
The Masses ◽  
Massive Clusters ◽  
Centaurus A

AbstractWe present an analysis of the radial velocities and velocity dispersions for 27 bright globular clusters in the nearby elliptical galaxy NGC 5128 (Centaurus A). For 22 clusters we combine our new velocity dispersion measurements with the information on the structural parameters, either from the literature when available or from our own data, in order to derive the cluster masses and mass-to-light (M/L) ratios. The masses range from 1.2 × 105M⊙, typical of Galactic globular clusters, to 1.4 × 107M⊙, similar to more massive dwarf globular transition objects (DGTOs) or ultra compact dwarfs (UCDs) and to nuclei of nucleated dE galaxies. The average M/LV is 3±1, larger than the average M/LV of globular clusters in the Local Group galaxies. The correlations of structural parameters, velocity dispersion, masses and M/LV for the bright globular clusters extend the properties established for the most massive Local Group clusters towards those characteristic of dwarf elliptical galaxy nuclei and DGTOs/UCDs. The detection of the mass-radius and the mass-M/LV relations for the globular clusters with masses greater than ~ 2 × 106M⊙ provides the link between “normal” old globular clusters, young massive clusters, and evolved massive objects.

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