Results 41 to 50 of about 85,801 (378)
The Origin of Gamma-Rays from Globular Clusters [PDF]
, 2010 Fermi has detected gamma-ray emission from eight globular clusters. We suggest that the gamma-ray emission from globular clusters may result from the inverse Compton scattering between relativistic electrons/positrons in the pulsar wind of MSPs in the ...
Cheng, K. S. +4 more
core +2 more sources
The Global Mass Functions of 35 Galactic globular clusters: II. Clues on the Initial Mass Function and Black Hole Retention Fraction [PDF]
, 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
Black Hole Mergers from Hierarchical Triples in Dense Star Clusters [PDF]
Astrophysical Journal, 2020 Hierarchical triples are expected to be produced by the frequent binary-mediated interactions in the cores of globular clusters. In some of these triples, the tertiary companion can drive the inner binary to merger following large eccentricity ...
Miguel A. S. Martinez +10 more
semanticscholar +1 more source
Variability in NGC 3201 Giant Stars
The Astronomical Journal, 2023 We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201. Our aim is to expand the sample of new types of variables reported in a previous study. These variables show a short period ( P _V < 0.6 day)
C. C. Cortés +4 more
doaj +1 more source
Star Formation in Violent and Normal Evolutionary Phases [PDF]
, 2001 Mergers of massive gas-rich galaxies trigger violent starbursts that - over timescales of $> 100$ Myr and regions $> 10$ kpc - form massive and compact star clusters comparable in mass and radii to Galactic globular clusters.
BC Whitmore +9 more
core +2 more sources
Missing for 20 yr: MeerKAT Redetects the Elusive Binary Pulsar M30B
The Astrophysical Journal Letters, 2023 PSR J2140−2311B is a 13 ms pulsar discovered in 2001 in a 7.8 hr Green Bank Telescope observation of the core-collapsed globular cluster M30 and predicted to be in a highly eccentric binary orbit.
Vishnu Balakrishnan +16 more
doaj +1 more source
Dynamics and Interactions of Binaries and Neutron Stars in Globular Clusters [PDF]
, 1994 We model the dynamics of test binaries in isotropic, multi-mass models of galactic globular clusters. The evolution of binary orbits through the cluster potentials is modeled, including second order diffusion terms, and probabilities for close encounters
Phinney, E. S., Sigurdsson, Steinn
core +3 more sources
New Parameters for Star Cluster Dynamics: The Effect of Primordial Binaries and Dark Remnants
The Astrophysical Journal, 2023 By studying the normalized cumulative radial distribution (nCRD) of the stars in the central region of a Monte Carlo-simulated globular cluster, we recently defined three parameters able to pinpoint the stage of internal dynamical evolution reached by ...
B. Bhat +3 more
doaj +1 more source
Massive Black Holes in Star Clusters. II. Realistic Cluster Models [PDF]
, 2004 We have followed the evolution of multi-mass star clusters containing massive central black holes through collisional N-body simulations done on GRAPE6.
Frank J. +5 more
core +4 more sources
Variable Stars and Evolution in Globular Clusters [PDF]
Symposium - International Astronomical Union, 1973 Traditionally, cluster variables have been used as distance indicators and have in this sense played an important role in our understanding of stellar evolution. In particular, the determination of the distance moduli of globular clusters and of the absolute magnitude of the main sequence turnoff, thus yielding the ages of the cluster, have relied ...
openaire +4 more sources