Results 1 to 10 of about 86,850 (239)
The Cosmic Evolution of Binary Black Holes in Young, Globular and Nuclear Star Clusters: Rates, Masses, Spins and Mixing Fractions [PDF]
, 2021 The growing population of binary black holes (BBHs) observed by gravitational wave detectors is a potential Rosetta stone for understanding their formation channels. Here, we use an upgraded version of our semi-analytic codes fastcluster and cosmoRate to
M. Mapelli +4 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
The 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
Multiple Populations in Star Clusters [PDF]
Universe, 2022 We review the multiple population (MP) phenomenon of globular clusters (GCs): i.e., the evidence that GCs typically host groups of stars with different elemental abundances and/or distinct sequences in photometric diagrams.
A. Milone, A. Marino
semanticscholar +1 more source
oMEGACat. I. MUSE Spectroscopy of 300,000 Stars within the Half-light Radius of ω Centauri
The Astrophysical Journal, 2023 Omega Centauri ( ω Cen) is the most massive globular cluster of the Milky Way and has been the focus of many studies that reveal the complexity of its stellar populations and kinematics.
M. S. Nitschai +19 more
doaj +1 more source
EVOLUTION OF THE MASS AND LUMINOSITY FUNCTIONS OF GLOBULAR STAR CLUSTERS [PDF]
, 2016 We reexamine the dynamical evolution of the mass and luminosity functions of globular star clusters (GCMF and GCLF). Fall & Zhang (2001, FZ01) showed that a power-law MF, as commonly seen among young cluster systems, would evolve by dynamical processes ...
P. Goudfrooij, S. M. Fall
semanticscholar +1 more source
First Evidence of Multi-iron Subpopulations in the Bulge Fossil Fragment Candidate Liller 1
The Astrophysical Journal, 2023 In the context of a project aimed at characterizing the properties of the so-called Bulge Fossil Fragments (the fossil remnants of the bulge formation epoch), here we present the first determination of the metallicity distribution of Liller 1.
Chiara Crociati +11 more
doaj +1 more source
Can Neutron-star Mergers Explain the r-process Enrichment in Globular Clusters? [PDF]
Astrophysical Journal, 2019 Star-to-star dispersion of r-process elements has been observed in a significant number of old, metal-poor globular clusters (GCs). We investigate early-time neutron-star mergers as the mechanism for this enrichment.
M. Zevin +6 more
semanticscholar +1 more source
Future of the General Catalogue of Variable Stars from the Experience of Recent Name-lists
Open 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 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