The collapse of density peaks in a Gaussian random field

Details The collapse of density peaks in a Gaussian random field The collapse of density peaks in a Gaussian random field

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333...78r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 1, 1988, p. 78-89.

Astronomy and Astrophysics

Astrophysics

43

Galactic Evolution, Galactic Rotation, Mass Distribution, Normal Density Functions, Angular Momentum, Galactic Clusters, Power Spectra

Scientific paper

The collapse of density peaks is investigated in Gaussian random density fields with power spectra P(k) proportional to k exp n, in the cases n = -2, -1, 0, and + 1. The density, velocity dispersion, and angular momentum are computed, taking into account density perturbations superposed on a spherical central peak. In the absence of dissipation, flat rotation curves require n roughly -1. If a fraction f roughly 0.1 of the mass dissipates its energy and falls toward the center of the mass distribution, then n roughly -2 leads to flat rotation curves. The dimensionless spin parameter Lambda is insensitive to the value of n; the spherical infall approximation yields Lambda roughly 0.09 for 3 sigma peaks.

Affiliated with

Also associated with

No associations

Rating

The collapse of density peaks in a Gaussian random field 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 The collapse of density peaks in a Gaussian random field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The collapse of density peaks in a Gaussian random field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1598068