CDM with thermal history of baryons: High-resolution 2-D and 3-D simulations

Details CDM with thermal history of baryons: High-resolution 2-D and 3-D simulations CDM with thermal history of baryons: High-resolution 2-D and 3-D simulations

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991tpsu.rept...21k&link_type=abstract

In MPI für Physik und Astrophysik, Traces of the Primordial Structure in the Universe p 21-30 (SEE N92-29833 20-90)

Astronomy and Astrophysics

Astronomy

Astronomical Models, Baryons, Dark Matter, Galactic Evolution, Galactic Structure, Rosat Mission, Thermal Simulation, Cosmology, Gas Temperature, Gravitational Fields, Three Dimensional Models, Two Dimensional Models

Scientific paper

Results of recent two dimensional and three dimensional simulations of gravitational and thermal processes involved in galaxy formation are described and compared. The physics is simplified in the simulations discussed by the assumption that baryons move along the same trajectories as dark matter, i.e., the density ratio of dark matter to baryons is taken to be a constant. To the extent that deviations from this assumption occur over scales smaller than those of interest, the technique makes new and reliable predictions relevant to temperature and emission properties of hot gas in superclusters and to galaxy formation in Cold Dark Matter (CDM). In particular, gas present in superclusters should have a characteristic temperature of approximately 1,000,000 K, which is ten times lower than estimated previously. The most favorable range for observing this radiation is about 100 to 300 eV. Soft x-rays emitted from hot gas in known superclusters may be detectable at the limits of sensitivity of Rosat (x-ray astronomy satellite) by averaging position sensitive proportional counters counts over a sufficiently large region.

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