The Formation of Hot Gaseous Haloes in Elliptical Galaxies with Massive Dark Haloes

Details The Formation of Hot Gaseous Haloes in Elliptical Galaxies with Massive Dark Haloes The Formation of Hot Gaseous Haloes in Elliptical Galaxies with Massive Dark Haloes

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pthph..78.1099h&link_type=abstract

Progress of Theoretical Physics, Vol. 78, No. 5, pp. 1099-1116

Physics

5

Scientific paper

The time evolution of a hot gaseous halo in an elliptical galaxy for the Hubble time is calculated numerically and effects of the gravity of massive dark halo on a structure of a hot gaseous halo are investigated. The potential of a massive dark halo is assumed to be 2 ~ 3 times deeper than that of massive dark halo of a spiral galaxy. At the present epoch, two types of gaseous haloes are formed. The first type is the X-ray bright gaseous halo in which the hot gas is confined gravitationally. The second type is the dim X-ray halo in which the hot gas flows outward from the central region. We show the recent observations of X-ray coronae of elliptical galaxies are well explained by our model. Some discussions on the relation between X-ray luminosities of X-ray coronae and mass of elliptical galaxies are given.

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