Pregalactic formation of globular clusters in cold dark matter

Details Pregalactic formation of globular clusters in cold dark matter Pregalactic formation of globular clusters in cold dark matter

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...330..191r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 330, July 1, 1988, p. 191-200.

Astronomy and Astrophysics

Astrophysics

44

Dark Matter, Galactic Evolution, Galactic Mass, Globular Clusters, Milky Way Galaxy, Star Formation, Angular Momentum, Gravitational Collapse, Magellanic Clouds, Perturbation Theory

Scientific paper

The pregalactic hypothesis for the formation of globular clusters is reconsidered in the light of Zinn's (1985) discovery of a two-component globular population in the Milky Way. For a cold dark matter spectrum, high-sigma fluctuations of 10 to the 5th - 10 to the 6th solar masses are assumed to be the progenitors of the spheroidal population of globular clusters. The mass fraction of globular clusters in galaxies then requires that perturbations above roughly 2.8 sigma survive as globulars, and their observed radii require baryonic collapse factors of order 10. Such an absolute density threshold for globular cluster formation achieves adequate fits to observed cluster radii and densities, the mass fraction of globulars versus Hubble type, the radial density profile of globulars within galaxies, and the globular luminosity function. However, a fixed density threshold criterion for cluster survival lacks convincing physical justification and does not by itself explain the homogeneous metallicities within clusters or the large metallicity variations from cluster to cluster and from galaxy to galaxy.

Affiliated with

Also associated with

No associations

Rating

Pregalactic formation of globular clusters in cold dark matter 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 Pregalactic formation of globular clusters in cold dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pregalactic formation of globular clusters in cold dark matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1422448