Mass and Rate of Hierarchical Black Hole Mergers in Young, Globular and Nuclear Star Clusters [PDF]
Symmetry, 2020 Hierarchical mergers are one of the distinctive signatures of binary black hole (BBH) formation through dynamical evolution. Here, we present a fast semi-analytic approach to simulate hierarchical mergers in nuclear star clusters (NSCs), globular ...
M. Mapelli +5 more
semanticscholar +2 more sources
On the Rate of Neutron Star Binary Mergers from Globular Clusters [PDF]
Astrophysical Journal, 2019 The first detection of gravitational waves from a neutron star–neutron star (NS–NS) merger, GW170817, and the increasing number of observations of short gamma-ray bursts have greatly motivated studies of the origins of NS–NS and neutron star–black hole ...
Claire S. Ye +6 more
semanticscholar +3 more sources
Bound star clusters observed in a lensed galaxy 460 Myr after the Big Bang. [PDF]
NatureThe Cosmic Gems arc is among the brightest and highly magnified galaxies observed at redshift z ≈ 10.2 (ref. 1). However, it is an intrinsically ultraviolet faint galaxy, in the range of those now thought to drive the reionization of the Universe2–4 ...
Adamo A +27 more
europepmc +2 more sources
ELVES II: Globular Clusters and Nuclear Star Clusters of Dwarf Galaxies: the Importance of Environment [PDF]
Astrophysical Journal, 2021 We present the properties of the globular clusters (GCs) and nuclear star clusters (NSCs) of low-mass (105.5 < M ⋆ < 108.5 M ⊙) early-type satellites of Milky Way–like and small group hosts in the Local Volume (LV) using deep, ground-based data from the ...
S. Carlsten +3 more
semanticscholar +1 more source
Hierarchical black hole mergers in young, globular and nuclear star clusters: the effect of metallicity, spin and cluster properties [PDF]
, 2021 We explore hierarchical black hole (BH) mergers in nuclear star clusters (NSCs), globular clusters (GCs) and young star clusters (YSCs), accounting for both original and dynamically assembled binary BHs (BBHs).
M. Mapelli +10 more
semanticscholar +1 more source
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
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
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
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
STAR CLUSTERS IN M31. VII. GLOBAL KINEMATICS AND METALLICITY SUBPOPULATIONS OF THE GLOBULAR CLUSTERS [PDF]
, 2016 We carry out a joint spatial–kinematical–metallicity analysis of globular clusters (GCs) around the Andromeda Galaxy (M31), using a homogeneous, high-quality spectroscopic data set.
N. Caldwell, A. Romanowsky
semanticscholar +1 more source