Thermal history of inter-cluster relativistic electron gas heated by quasars

Details Thermal history of inter-cluster relativistic electron gas heated by quasars Thermal history of inter-cluster relativistic electron gas heated by quasars

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.158..265p&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 158, no. 2, Aug. 1989, p. 265-279. Research supported by CNPq.

Statistics

Computation

1

Computational Astrophysics, Cosmology, Gas Heating, Quasars, Relativistic Electron Beams, Stellar Temperature, Compton Effect, Cosmic Plasma, Evolution (Development), Red Shift, Relic Radiation, Thermal Analysis, Wave Propagation

Scientific paper

The thermal evolution of an inter-cluster gas of relativistic electrons heated by quasars with redshifts up to z = 3 and 4 is studied in the framework of a Friedmann-Robertson-Walker universe. The gas cools by Compton scattering with the microwave background radiation and by adiabatic cooling due to the universe expansion. Power and exponential laws of cosmological evolution of the comoving density of sources are considereed. The obtained temperatures are sensitive to the form of these laws and to the heating epochs. Compared to the nonrelativistic models, the results obtained in the case of the power law present strong differences. These differences decrease when the exponential law is considered. It is shown that, in some cases, nonequilibrium effects may be important. The time delay effects in the propagation of electromagnetic waves in cosmic plasma are shown to be very important for the analysis of theoretical models.

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