Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993acaps..13...16m&link_type=abstract
Chinese Astronomy and Astrophysics (ISSN 0275-1062) Transl. of Acta Astrophysica Sinica, vol. 13, no. 1, 1993, p. 16-24., vol. 1
Astronomy and Astrophysics
Astronomy
Galactic Clusters, Interstellar Gas, Radio Galaxies, Red Shift, Active Galactic Nuclei, Dark Matter, Galactic Evolution, Radio Jets (Astronomy), Star Formation, Thermal Stability
Scientific paper
In the framework of biased cold dark matter scheme (CDM model), assuming galaxies were formed at z of about 5, the virialization process of groups and clusters of galaxies is investigated. Because the amplitudes of primordial fluctuation at different scales are similar, when groups and clusters of galaxies virialize, the galaxies still have a rich interstellar gas and can be strongly affected by their environment. Galaxies will acquire high velocity and collide with each other during or after the virialization process; this may be the cause of activities in galaxies. High pressure cocoons formed by radio jets and the high ram pressure in the central region of a cluster of galaxies will expel the hot gas and squeeze the warm clouds in the interstellar medium. A starburst will follow, which can account for the Butcher-Oemler effect in clusters of galaxies and the radio-optical alignments of high redshift radio galaxies.
Chen Shi
Ma Er
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