Results 41 to 50 of about 2,000,138 (297)
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
Diffusion and Mixing in Globular Clusters [PDF]
The Astrophysical Journal, 2018 Abstract Collisional relaxation describes the stochastic process with which a self-gravitating system near equilibrium evolves in phase-space due to the fluctuating gravitational field of the system. The characteristic timescale of this process is called the relaxation time. In this paper, we highlight the difference between two measures
Yohai Meiron, Bence Kocsis
openaire +5 more sources
THE ABUNDANCES IN THE STELLAR ATMOSPHERES IN THE M13 GLOBULAR CLUSTER
Odessa Astronomical Publications, 2017 The chemical composition of 5 stars' atmospheres in globular cluster M13 and 2 halo stars taken from literature have been computed. A slight excess of O and deficit of Mg have been defined for globular cluster stars.
T. V. Mishenina, S. V. Kutsenko
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
MUSE crowded field 3D spectroscopy of over 12 000 stars in the globular cluster NGC 6397 - I. The first comprehensive HRD of a globular cluster [PDF]
, 2016 Aims. We demonstrate the high multiplex advantage of crowded field 3D spectroscopy with the new integral field spectrograph MUSE by means of a spectroscopic analysis of more than 12 000 individual stars in the globular cluster NGC 6397. Methods.
T. Husser +10 more
semanticscholar +1 more source
Gravitational Radiation from Black Hole Binaries in Globular Clusters [PDF]
, 2001 A populations of stellar mass black hole binaries may exist in globular clusters. The dynamics of globular cluster evolution imply that there may be at most one black hole binary is a globular cluster.
Benacquista M J +3 more
core +3 more sources
r-process Abundance Patterns in the Globular Cluster M92
The Astrophysical Journal, 2023 Whereas light-element abundance variations are a hallmark of globular clusters, there is little evidence for variations in neutron-capture elements. A significant exception is M15, which shows a star-to-star dispersion in neutron-capture abundances of at
Evan N. Kirby +2 more
doaj +1 more source
The dragon simulations: globular cluster evolution with a million stars [PDF]
, 2016 Introducing the dragon simulation project, we present direct N-body simulations of four massive globular clusters (GCs) with 106 stars and 5 per cent primordial binaries at a high level of accuracy and realism.
Long Wang +8 more
semanticscholar +1 more source
Dynamical Friction in dE Globular Cluster Systems [PDF]
, 2001 The dynamical friction timescale for globular clusters to sink to the center of a dwarf elliptical galaxy (dE) is significantly less than a Hubble time if the halos have King-model or isothermal profiles and the globular clusters formed with the same ...
Bender R. +15 more
core +2 more sources
The youngest globular clusters [PDF]
International Journal of Modern Physics D, 2014 It is likely that all stars are born in clusters, but most clusters are not bound and disperse. None of the many protoclusters in our Galaxy are likely to develop into long-lived bound clusters. The super star clusters (SSCs) seen in starburst galaxies are more massive and compact and have better chances of survival. The birth and early development of
openaire +3 more sources