What should be the gradient of the dispersion of the radial velocities of stars in the disks of galaxies?

Details What should be the gradient of the dispersion of the radial velocities of stars in the disks of galaxies? What should be the gradient of the dispersion of the radial velocities of stars in the disks of galaxies?

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986afz....24..467m&link_type=abstract

(Astrofizika, vol. 24, May-June 1986, p. 467-476) Astrophysics (ISSN 0571-7132), vol. 24, no. 3, Nov. 1986, p. 266-271. Translat

Astronomy and Astrophysics

Astrophysics

2

Disk Galaxies, Galactic Structure, Radial Velocity, Stellar Rotation, Stellar Structure, Velocity Distribution, Stellar Gravitation, Stellar Oscillations

Scientific paper

The dispersion of radial velocities of stars c* (which is a minimum necessity for gravitational stability of the stellar disk) has been calculated as a function of radial inhomogeneity scales of surface density Lσ, dispersion of radial velocities of stars Lc and other disk parameters. It has been shown tat the quantity c* reaches its minimum value with η = Lσ/Lc ≅ 1. This result presents a satisfactory agreement with the observational data.

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