The velocity dispersion anisotropy and mass-to-light ratio of elliptical galaxies

Details The velocity dispersion anisotropy and mass-to-light ratio of elliptical galaxies The velocity dispersion anisotropy and mass-to-light ratio of elliptical galaxies

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.253..710v&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 253, Dec. 15, 1991, p. 710-726.

Astronomy and Astrophysics

Astronomy

244

Elliptical Galaxies, Mass To Light Ratios, Velocity Distribution, Anisotropy, Astronomical Models, Astronomical Photometry, Dynamic Models, Galactic Structure

Scientific paper

The kinematics are predicted for 37 bright elliptical galaxies for which axisymmetric dynamical models are developed and for which both photometrical and major- and minor-axis kinematical data exist. Assumptions are made including a velocity ellipsoid and a constant mass-to-light ratio, and the model predictions are analyzed critically. Because the models predict too much motion on the major axis it is proposed that the elliptical galaxies have a velocity ellipsoid that has not previously been shown. The results support the validity of N-body simulations of dissipationless collapse, and mass-to-light ratios from the models are corrected for rotation and radial anisotropy. Because the observed galaxy velocities systematically exceed the model predictions, it is concluded that axisymmetric constant mass-to-light ratios are untenable. The conclusions suggest the presence of dark halos in the galaxies or the need for exploring triaxial models for the mass-to-light ratios.

Affiliated with

Also associated with

No associations

Rating

The velocity dispersion anisotropy and mass-to-light ratio of elliptical 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 velocity dispersion anisotropy and mass-to-light ratio of elliptical galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The velocity dispersion anisotropy and mass-to-light ratio of elliptical galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1541351