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1999ApJ...514..765S - Astrophys. J., 514, 765-771 (1999/April-1)
Hot gas halo of NGC 3923: circulation of intergalactic matter.
SATO S. and TAWARA Y.
Abstract (from CDS):
The observed mass of the hot gas, Mgas=5.7x107 M☉, can be produced in 0.063 Gyr by the stellar mass loss; the observed mass of Fe, MFe=1.2(0.71-2.2)x105M☉, can be produced in 0.027 Gyr by Type Ia supernovae. From the short timescales that are inferred, we conclude that NGC 3923 must be in the outflow phase at present.
We show that most early-type galaxies are in their outflow phase at present and that the dynamical accretion of gas clouds, which has been expected from the hierarchical clustering theory, is necessary to explain the observed Fe abundances of early-type galaxies. The outflow driven by Type Ia supernovae and gas accretion due to the dynamical interaction of dark matter clouds produce a large-scale circulation of intergalactic matter.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Abundances - Galaxies: Halos - galaxies: individual (NGC 3923) - X-Rays: Galaxies
Simbad objects: 5
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