Cosmological Origin of the Stellar Velocity Dispersions in Massive Early‐Type Galaxies

Abstract

We show that the observed upper bound on the line-of-sight velocity dispersion of the stars in an early-type galaxy, σe ~6. Subsequently, the stars behaved dynamically just as an additional component of the dark matter. The second hypothesis is that the mass distribution characteristic of a newly formed dark matter halo forgets such details of the initial conditions as the stellar ``collisionless matter'' that was added to the dense parts of earlier generations of halos. We also assume that the stellar velocity dispersion does not evolve much at z