Galaxy and structure formation with hot dark matter and cosmic strings

Details Galaxy and structure formation with hot dark matter and cosmic strings Galaxy and structure formation with hot dark matter and cosmic strings

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvl..59.2371b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 59, Nov. 16, 1987, p. 2371-2374.

Astronomy and Astrophysics

Astronomy

54

Astronomical Models, Cosmology, Dark Matter, Galactic Structure, String Theory, Galactic Clusters, Galactic Mass, Neutrinos, Nuclear Fusion, Perturbation Theory

Scientific paper

Galaxy and structure formation in a neutrino-dominated universe with cosmic strings is investigated. Strings survive neutrino free streaming to seed galaxies and clusters. The effective maximum Jeans mass is about 1.5 x 10 to the 14th h(50)exp -4 solar masses, lower than in the adiabatic scenario. Hence, cluster formation is only marginally different from that in the cold-dark-matter and strings model, but galaxy masses are lower. The mass spectrum of galaxies is flatter than with cold dark matter, and the density profile about an individual loop is less steep, in better agreement with observations.

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