Results 21 to 30 of about 2,037,911 (340)
Proceedings of the National Academy of Sciences, 1998 We review two new methods to determine the age of globular clusters (GCs). These two methods are more accurate than the classical isochrone fitting technique. The first method is based on the morphology of the horizontal branch and is independent of the distance modulus of the globular cluster.
openaire +2 more sources
Extensive Globular Cluster Systems Associated with Ultra Diffuse Galaxies in the Coma Cluster [PDF]
, 2017 We present Hubble Space Telescope (HST) imaging of two ultra diffuse galaxies (UDGs) with measured stellar velocity dispersions in the Coma cluster. The galaxies, Dragonfly 44 and DFX1, have effective radii of 4.7 kpc and 3.5 kpc and velocity dispersions
P. V. van Dokkum +9 more
semanticscholar +1 more source
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
Secondary Globular Cluster populations [PDF]
Astronomy & Astrophysics, 2004 18 pages, 7 figures, accepted for A& ...
openaire +3 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
New VVV Survey Globular Cluster Candidates in the Milky Way Bulge [PDF]
Monthly notices of the Royal Astronomical Society, 2017 It is likely that a number of Galactic globular clusters remain to be discovered, especially toward the Galactic bulge. High stellar density combined with high and differential interstellar reddening are the two major problems for finding globular ...
D. Minniti +21 more
semanticscholar +1 more source
Improving the open cluster census. II. An all-sky cluster catalogue with Gaia DR3 [PDF]
Astronomy & Astrophysics, 2023 Data from the Gaia satellite are revolutionising our understanding of the Milky Way. With every new data release, there is a need to update the census of open clusters. We aim to conduct a blind, all-sky search for open clusters using 729 million sources
E. L. Hunt, S. Reffert
semanticscholar +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
Evidence for an intermediate-mass black hole in the globular cluster NGC 6624 [PDF]
, 2017 PSR B1820−30A is located in the globular cluster NGC 6624 and is the closest known pulsar to the centre of any globular cluster. We present more than 25 yr of high-precision timing observations of this millisecond pulsar and obtain four rotational ...
B. Perera +13 more
semanticscholar +1 more source
The 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