SIMBAD references

1999ApJ...524L..15G - Astrophys. J., 524, L15-L18 (1999/October-2)

Dark Mass-to-Luminous mass coupling in Virgo.


Abstract (from CDS):

The empirical relation of coupling in Md=γM1/2r between the halo dark mass distribution Md and visible mass M at radius r, previously shown in spiral galaxies and in the core of MS 2137-2353, is tested for the inner 150 h–1 kpc Virgo Cluster core. If the stellar mass-to-light ratio in M87 is treated as a free parameter, the density distribution predicted by this relation is found to be consistent with that derived from published surface photometry, stellar and globular cluster dynamics, and X-ray observations. The best fit is obtained for Υ*(M87)=6 (M/LB), but a wide range of stellar mass-to-light ratios are possible. At r>50 kpc, the relation of coupling and the equation of dynamical equilibrium of the gas are the same. The extrapolated dark mass is also consistent with the kinematics of early-type galaxies on a larger, megaparsec scale for Υ*(M87)=8-11 (M/LB). The cluster dark mass halo and the stellar mass in M87 have equal weight at ∼1/2-3/4 effective radius.

Abstract Copyright:

Journal keyword(s): Cosmology: Dark Matter - Galaxies: Clusters: Individual: Name: Virgo - Galaxies: Individual: Messier Number: M87 - Galaxies: Intergalactic Medium

Simbad objects: 5

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