Statistics – Computation
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100.1386c&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Nov. 1988, p. 1386-1392.
Statistics
Computation
4
Astronomical Models, Computational Astrophysics, Cosmology, Galactic Evolution, Intergalactic Media, Baryons, Dark Matter, Gravitational Effects
Scientific paper
The way that baryonic matter left over from galaxy formation would evolve in a cold dark matter-dominated universe if there was significant energy feedback from pregalactic objects is investigated. It is found that the growth of density fluctuations on small scales in the gas component is substantially reduced during the period of galaxy heating. Large connected structures dominate the distribution of the model intergalactic matter (IGM). The gas is mostly ionized, with less than one percent of the gas with temperatures below 10,000 K, whereas about 40 percent is above 10 to the 6th K. Pressure equilibrium is absent in the model IGM. Condensed gas is confined by the gravity of the dark matter, except during the very short period of galaxy heating. At late times the power spectrum of the model IGM is substantially depressed at short wavelengths. The two-point correlation function of the model IGM fits the observed galaxy-galaxy two-point correlation function for separations between 0.3/h Mpc and 2.4/h Mpc.
Chiang Wei-Hwan
Ryu Dongsu
Vishniac Ethan T.
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