Results 21 to 30 of about 2,000,138 (297)
Globular cluster star classification: Application to M13 [PDF]
Serbian Astronomical Journal, 2013 Starting from recent determination of Fe, O, Na abundances on a restricted sample (N = 67) of halo and thick disk stars, a natural and well motivated selection criterion is defined for the classification globular cluster stars. An application is
Caimmi R.
doaj +1 more source
A detached stellar-mass black hole candidate in the globular cluster NGC 3201 [PDF]
, 2018 As part of our massive spectroscopic survey of 25 Galactic globular clusters with MUSE, we performed multiple epoch observations of NGC 3201 with the aim of constraining the binary fraction. In this cluster, we found one curious star at the main-sequence
B. Giesers +11 more
semanticscholar +1 more source
The Relationship between Globular Cluster Mass, Metallicity, and Light-element Abundance Variations [PDF]
Astronomical Journal, 2019 We investigate aluminum abundance variations in the stellar populations of globular clusters using both literature measurements of sodium and aluminum and APOGEE measurements of nitrogen and aluminum abundances.
D. Nataf +9 more
semanticscholar +1 more source
Binaries in globular clusters [PDF]
Publications of the Astronomical Society of the Pacific, 1992 Binary stars in a globular cluster (hereafter, GC) may be primordial (i.e. formed along with the cluster), or the result of cluster dynamics. “Dynamical” binaries can result from conservative three-body encounters (e.g. Spitzer, 1987) if a third star can carry away enough kinetic energy to leave two others bound, or from dissipative two-body encounters,
HUT, P +8 more
openaire +4 more sources
Binary black hole mergers from globular clusters: the impact of globular cluster properties [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The dense environment of globular clusters (GCs) can facilitate the formation of binary black holes (BBHs), some of which can merge with gravitational waves within the age of the Universe.
Jongsuk Hong +5 more
semanticscholar +1 more source
Intergalactic Globular Clusters [PDF]
Highlights of Astronomy, 2005 AbstractWe confirm and extend our previous detection of a population of intergalactic globular clusters in Abell 1185, and report the first discovery of an intergalactic globular cluster in the nearby Virgo cluster of galaxies. The numbers, colors and luminosities of these objects can place constraints on their origin, which in turn may yield new ...
Nial R. Tanvir +7 more
openaire +3 more sources
HST Imaging of the Globular Clusters in the Fornax Cluster: NGC 1399 and NGC 1404 [PDF]
, 1997 The Fornax cluster galaxies NGC 1399 and NGC 1404 are ideal for studying the effects of a cluster environment on globular cluster systems. Here we present new optical imaging of these two galaxies from both the Hubble Space Telescope's Wide Field and ...
Carl J. Grillmair +5 more
core +4 more sources
Globular cluster candidates within the Fornax Cluster: Intracluster globulars? [PDF]
Astronomy & Astrophysics, 2003 We present the results of a search for globular clusters in the surroundings of 15 low surface brightness dwarf galaxies belonging to the Fornax Cluster, which was carried out on CCD images obtained with the C and T1 filters of the Washington photometric system.
Boris Dirsch +5 more
openaire +4 more sources
The Milky Way Bulge Extra-tidal Star Survey: BH 261 (AL 3)
The Astronomical Journal, 2023 The Milky Way Bulge extra-tidal star survey is a spectroscopic survey with the goal of identifying stripped globular cluster stars from inner Galaxy clusters.
Andrea Kunder +21 more
doaj +1 more source
A Photometric Survey of Globular Cluster Systems in Brightest Cluster Galaxies
The Astrophysical Journal Supplement Series, 2023 Hubble Space Telescope imaging for 26 giant early-type galaxies, all drawn from the MAST archive, is used to carry out photometry of their surrounding globular cluster (GC) systems. Most of these targets are Brightest Cluster Galaxies and their distances
William E. Harris
doaj +1 more source