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Title:
M87 revisited
Authors:
Dejonghe, H.
Affiliation:
AA(Institute for Advanced Study, Princeton, NJ)
Publication:
IN: Dynamics of dense stellar systems; Proceedings of the Workshop, Toronto, Canada, May 27, 28, 1988 (A90-42876 19-90). Cambridge, England and New York, Cambridge University Press, 1989, p. 69-74. Research supported by New Jersey High Technology Grant.
Publication Date:
00/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL PHOTOMETRY, BLACK HOLES (ASTRONOMY), GALACTIC NUCLEI, GALACTIC ROTATION, QUADRATIC PROGRAMMING, VIRGO GALACTIC CLUSTER, DISTRIBUTION FUNCTIONS, DYNAMIC MODELS, PROLATE SPHEROIDS, VELOCITY DISTRIBUTION
Bibliographic Code:
1989ddse.work...69D

Abstract

A quadratic programming (QP) method is tested for the construction of analytical dynamical models on M87 data from Young et al. (1978), Sargent et al. (1978), and Dressler (1980). The models obtained are shown to be compatible with the aforementioned data up to 80 arcseconds. Two cases are considered: one in which there is no black hole or tight star cluster, and another in which there is a 2.5 x 10 to the 9 solar mass black hole or tight star cluster. It follows from these models that more accurate velocity disperson profiles are needed to constrain the distribution function within reasonable limits. It is concluded that it might be worthwhile to construct prolate models for M87 in the absence of reasonably accurate and computationally efficient stability criteria.
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