Statistics – Computation
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...184..144m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 184, no. 1-2, Oct. 1987, p. 144-154. SNSF-supported research.
Statistics
Computation
112
Anisotropic Media, Astrodynamics, Centaurus Constellation, Galactic Rotation, Globular Clusters, Computational Astrophysics, Distribution Functions
Scientific paper
A King-Michie dynamical model has been built, based on an assumed form of the phase-space distribution function f(E,J) which induces a radial anisotropic velocity dispersion. This model consists of ten different subpopulations representing heavy remnants, white dwarfs and main sequence stars. From fitting to the surface brightness profile already published in the literature and to the mean radial velocities obtained with CORAVEL for 318 individual stars in ω Centauri, it appears that only models with strong anisotropy of the velocity dispersion (ra = 2 - 3 rc) agree with the observations. This result is related to the large half-mass relaxation time, which amounts to 20 - 30×109yr, the central relaxation time being of the order of 109yr. The mean value of the mass function exponent x is 1.34. The fraction of the total mass in the form of remnants heavier than the white dwarfs equals 0 to 9% of the total mass of the cluster, being inversely proportional to the fraction of white dwarfs. The total mass Mtot = 3.9×106M_sun; gives a mass-to-light ratio M/LV = 2.9.
No associations
LandOfFree
Studies of dynamical properties of globular clusters. III - Anisotropy in Omega Centauri does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Studies of dynamical properties of globular clusters. III - Anisotropy in Omega Centauri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Studies of dynamical properties of globular clusters. III - Anisotropy in Omega Centauri will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1772487