Results 1 to 10 of about 89,654 (284)

Relativistic Binaries in Globular Clusters [PDF]

open access: yesLiving Reviews in Relativity, 2013
Galactic globular clusters are old, dense star systems typically containing 10^4 – 10^6 stars. As an old population of stars, globular clusters contain many collapsed and degenerate objects. As a dense population of stars, globular clusters are the scene
Matthew J. Benacquista   +1 more
doaj   +9 more sources

Relativistic Binaries in Globular Clusters [PDF]

open access: yesLiving Reviews in Relativity, 2006
The galactic population of globular clusters are old, dense star systems, with a typical cluster containing 10^4 - 10^7 stars. As an old population of stars, globular clusters contain many collapsed and degenerate objects. As a dense population of stars,
Benacquista Matthew J.
doaj   +10 more sources

Gamma-ray Emission from Globular Clusters [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2016
Over the last few years, the data obtained using the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope has provided new insights on high-energy processes in globular clusters, particularly those involving compact objects such as ...
Pak-Hin T. Tam   +2 more
doaj   +4 more sources

The GeMS/GSAOI Galactic Globular Cluster Survey (G4CS). II. Characterization of 47 Tuc with Bayesian Statistics

open access: yesThe Astrophysical Journal, 2023
We present a photometric analysis of globular cluster 47 Tuc (NGC 104) using near-IR imaging data from the GeMS/GSAOI Galactic Globular Cluster Survey (G4CS), which is in operation at Gemini-South telescope.
Mirko Simunovic   +7 more
doaj   +1 more source

A Wide View of the Galactic Globular Cluster NGC 2808: Red Giant and Horizontal Branch Star Spatial Distributions

open access: yesThe Astronomical Journal, 2023
Wide-field and deep DECam multiband photometry, combined with HST data for the core of the Galactic globular cluster NGC 2808, allowed us to study the distribution of various stellar subpopulations and stars in different evolutionary phases out to the ...
Christian I. Johnson   +9 more
doaj   +1 more source

On the density and surface brightness profiles in globular star clusters [PDF]

open access: yesSerbian Astronomical Journal, 2007
A model of mass distribution, applicable to globular star clusters and proposed earlier, is reconsidered. It is shown that it can be related to the well-known Plummer-Schuster formula, and the equations yielding its dimensionless parameters are given ...
Ninković S., Valjarević A.
doaj   +1 more source

RR Lyrae and Type II Cepheid Variables in Globular Clusters: Optical and Infrared Properties

open access: yesUniverse, 2022
Globular clusters are both primary fossils of galactic evolution and formation and are ideal laboratories for constraining the evolution of low-mass and metal-poor stars.
Anupam Bhardwaj
doaj   +1 more source

Calibrating X-Ray Binary Luminosity Functions via Optical Reconnaissance. II. The High-mass XLF and Globular Cluster Population of X-Ray Binaries in the Low Star-forming Spiral M81

open access: yesThe Astrophysical Journal, 2023
We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multiband Hubble Space Telescope (HST) imaging data.
Qiana Hunt   +4 more
doaj   +1 more source

Future of the General Catalogue of Variable Stars from the Experience of Recent Name-lists

open access: yesOpen Astronomy, 2021
We briefly outline the history of the General Catalogue of Variable Stars (GCVS) and the New Catalogue of Suspected Variable Stars (NSV catalogue). Recently, we have completed a revision of the NSV catalogue.
Samus Nikolay N.   +5 more
doaj   +1 more source

The Global Mass Functions of 35 Galactic globular clusters: II. Clues on the Initial Mass Function and Black Hole Retention Fraction [PDF]

open access: yes, 2017
In this paper we compare the mass function slopes of Galactic globular clusters recently determined by Sollima & Baumgardt (2017) with a set of dedicated N-body simulations of star clusters containing between 65,000 to 200,000 stars.
Baumgardt, Holger, Sollima, Antonio
core   +2 more sources

Home - About - Disclaimer - Privacy