The origin of the mass, disk-to-halo mass ratio, and L-V relation of spiral galaxies

Details The origin of the mass, disk-to-halo mass ratio, and L-V relation of spiral galaxies The origin of the mass, disk-to-halo mass ratio, and L-V relation of spiral galaxies

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...359...15a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 359, Aug. 10, 1990, p. 15-22.

Astronomy and Astrophysics

Astrophysics

21

Galactic Evolution, Galactic Mass, Galactic Structure, Spiral Galaxies, Stellar Luminosity, Baryons, Dark Matter, Galactic Clusters, Galactic Rotation

Scientific paper

A model is presented in which spiral galaxies only form when t(c) is roughly equal to t(f) in a hot component of the protogalactic gas. This assumption, along with a disk stability criterion, predicts a range of spiral galaxy masses roughly consistent with observation. The nature of the cooling function for a primordial plasma implies that in less massive galaxies, more gas must fragment in the halo to preserve t(c) roughly equal to t(f). Consequently, less gas survives to form the disk, so that the disk-to-halo mass ratio increases with disk mass and hence galaxy luminosity. The canonical L proportional to V exp 4 relation can be reproduced by the model, and the apparent change in the slope of this relation also arises naturally. In the hierarchical clustering scenario, the model requires that all spirals formed at about the same epoch. These results support earlier claims that much of the dark matter observed in the universe is baryonic and probably formed during protogalactic collapse.

Affiliated with

Also associated with

No associations

Rating

The origin of the mass, disk-to-halo mass ratio, and L-V relation of spiral galaxies 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 origin of the mass, disk-to-halo mass ratio, and L-V relation of spiral galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The origin of the mass, disk-to-halo mass ratio, and L-V relation of spiral galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1125154