On the formation and structure of galactic halos

Details On the formation and structure of galactic halos On the formation and structure of galactic halos

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..489h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 15, 1988, p. 489-498.

Statistics

Computation

53

Dark Matter, Galactic Clusters, Galactic Evolution, Galactic Structure, Gravitational Collapse, Halos, Computational Astrophysics, Cosmology, Perturbation Theory, Power Spectra

Scientific paper

The author studies analytically the formation and structure of galaxies and clusters, which emerge from a primordial Gaussian perturbation (δ) field via gravitational instability. These bound objects are assumed to be seeded by local maxima of the δ-field. The density profile of these objects is found to depend on (1) the power spectrum of the δ-field, (2) the height of the peaks relative to the rms value of δ, and (3) the value of Ω0. In the cold dark matter case, flat or slightly increasing rotation curves are expected for all acceptable values of Ω0 and H0.

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