Erosion of globular cluster systems: the influence of radial anisotropy, central black holes and dynamical friction
Erosion of globular cluster systems: the influence of radial anisotropy, central black holes and dynamical friction
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球状星团系统的侵蚀:径向各向异性、中心黑洞和动力摩擦的影响
DOI:
10.1093/mnras/stu562
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发表时间:
2014
影响因子:
4.8
通讯作者:
Kroupa
中科院分区:
文献类型:
--
作者:
Brockamp;Küpper;A. H. W;Baumgardt;Kroupa
We present the adaptablemueslicode for investigating dynamics and erosion processes of globular clusters (GCs) in galaxies.Mueslifollows the orbits of individual clusters and applies internal and external dissolution processes to them. Orbit integration is based on the self-consistent field method in combination with a time-transformed leapfrog scheme, allowing us to handle velocity-dependent forces like triaxial dynamical friction. In a first application, the erosion of GC systems (GCSs) in elliptical galaxies is investigated. Observations show that massive ellipticals have rich, radially extended GCSs, while some compact dwarf ellipticals contain no GCs at all. For several representative examples, spanning the full mass scale of observed elliptical galaxies, we quantify the influence of radial anisotropy, galactic density profiles, supermassive black holes and dynamical friction on the GC erosion rate. We find that GC number density profiles are centrally flattened in less than a Hubble time, naturally explaining observed cored GC distributions. The erosion rate depends primarily on a galaxy's mass, half-mass radius and radial anisotropy. The fraction of eroded GCs is nearly 100 per cent in compact, M32-like galaxies and lowest in extended and massive galaxies. Finally, we uncover the existence of a violenttidal-disruption-dominated phasewhich is important for the rapid build-up of halo stars.
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DOI:
10.1046/j.1365-8711.2002.05848.x
发表时间:
2002
影响因子:
4.8
作者:
P. Kroupa;C. Boily
通讯作者:
C. Boily
影响因子:
4.8
作者:
R.Smith;M. Fellhauer;G. Candlish;R. Wojtak;J. Farias;M. Blaña
通讯作者:
M. Blaña
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Xufen Wu;P. Kroupa
通讯作者:
P. Kroupa
DOI:
10.1088/0004-637x/720/1/516
发表时间:
2010-04
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Burkert;S. Tremaine
通讯作者:
A. Burkert;S. Tremaine
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
A. Kuepper;R. Lane;D. Heggie
通讯作者:
D. Heggie