String-seeded spirals - Origin of rotation and the density of the halo

Details String-seeded spirals - Origin of rotation and the density of the halo String-seeded spirals - Origin of rotation and the density of the halo

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvl..57.2326z&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 57, Nov. 3, 1986, p. 2326-2329.

Astronomy and Astrophysics

Astrophysics

14

Galactic Evolution, Galactic Rotation, Space Density, Spiral Galaxies, String Theory, Density Distribution, Gravitational Collapse, Halos, Missing Mass (Astrophysics)

Scientific paper

Galactic halos seeded by loops of string in a universe dominated by dark matter fall into two categories: (1) Non-self-intersecting loops precipitate nearly spherically symmetric collapse and lead to a halo with low angular momentum J and a density profile ρ ≡ r-9/4. (2) Progeny of a self-intersecting primary loop recollapse into a single object which acquires J through tidal interactions. Its density profile, ρ ≡ r-2, is consistent with "flat rotation profiles" observed in spiral galaxies. It is tempting to identify these two types of string-seeded objects with (1) elliptical and (2) spiral galaxies.

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