Results 41 to 50 of about 334,935 (372)
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
Searching for New Globular Clusters in M31 with Gaia EDR3
The Astrophysical Journal, 2023 We have found 50 new globular cluster (GC) candidates around M31 with Gaia Early Data Release 3 (EDR3), with the help of Pan-STARRS1 DR1 magnitudes and Pan-Andromeda Archaeological Survey (PAndAS) images.
Yilun Wang +7 more
doaj +1 more source
On the Origin of GW190521-like Events from Repeated Black Hole Mergers in Star Clusters [PDF]
Astrophysical Journal, 2020 LIGO and Virgo have reported the detection of GW190521, from the merger of a binary black hole (BBH) with a total mass around 150 M⊙. While current stellar models limit the mass of any black hole (BH) remnant to about 40–50 M⊙, more massive BHs can be ...
G. Fragione, A. Loeb, F. Rasio
semanticscholar +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
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
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
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
Variable stars in the VVV globular clusters [PDF]
EPJ Web of Conferences, 2017 The VVV survey observed some of the most crowded and most obscured regions in the inner MilkyWay during the last years. A significant sample of the less known globular clusters in our galaxy lie there. Combining the high-resolution, wide-field, nearinfrared capabilities of the survey camera, the use of 5 different filters, and multi-epoch observations,
Dante Minniti +8 more
openaire +5 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