Cooling pancakes

Details Cooling pancakes Cooling pancakes

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210..515b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Oct. 1, 1984, p. 515-545. Research supported by th

Statistics

Computation

55

Big Bang Cosmology, Elementary Particle Interactions, Galactic Clusters, Galactic Evolution, Gravitational Collapse, Many Body Problem, Baryons, Computational Astrophysics, Density Wave Model, Neutrinos, Plasma Cooling, Shock Heating, Thermodynamics

Scientific paper

One-dimensional numerical simulations of the collapse, shock heating, and subsequent thermal evolution of pancakes are described. The pressure is found to be relatively uniform within the shocked region and approximately equals the instantaneous ram pressure acting at the shock front. An analytic theory based on this result is developed which accurately describes the numerical calculations. The fraction of baryons which cool below a given temperature depends sensitively upon the total mass of the collapsing system and the baryon density parameter, and somewhat upon the inclusion of conduction at high mass. Anisotropic expansion factors are used to simulate transverse flow toward string-like structures. In some cases, the increased baryon density can overcome the effects of adiabatic compression to enhance cooling.

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