Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...300l...1c&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 300, Jan. 1, 1986, p. L1-L4. NSERC-supported resear
Astronomy and Astrophysics
Astrophysics
29
Elliptical Galaxies, Galactic Evolution, Galactic Structure, Halos, Mass Distribution, Astronomical Models, Density Distribution, Galactic Nuclei, Many Body Problem, Star Distribution
Scientific paper
In the present N-body models for the formation of spheroids of galaxies, the material starts in uniform expansion. For the dissipationless case, turnaround and collapse accompanied by the formation and destruction of substructure yields a smooth object, similar to an elliptical galaxy, whose core density is low and outer density gradient too steep. Dissipation is added with a simple scheme of 'sticky' particle collisions between neighboring gas clouds that turns them into collisionless 'stars' after a given specific number of collisions, yielding final densities that are closer to the r to the 1/4-power function. These experiments are extended to include a dissipationless and massive dark halo whose mass is 10 times greater than that of the gas. In the most extreme case of dissipation, the dark halo stars have isotropic velocity dispersions.
Carlberg Ray G.
Lake George
Norman Colin A.
No associations
LandOfFree
Formation of elliptical galaxies and massive halos 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 Formation of elliptical galaxies and massive halos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of elliptical galaxies and massive halos will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1844670