Effects of Heavy Element Abundance on Evolution of Supernova Remnants

概要

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The evolution of supernova remnants is investigated numerically for the various abundances of the ambient medium in order to see the effects of a supernova explosion on the interstellar gas in various stages of the galactic evolution. It is shown that the time-evolution of a supernova remnant is delayed with the decrease in the heavy element abundance because of the suppressed cooling efficiency in the gas, and that the dynamical behavior of a remnant in the regime of z (the ratio of heavy element abundance to cosmic one) less than 10^<-2> is essentially the same as that in the case of no heavy element. The heavy element cooling also affects properties of dense shell behind the shock front, and the kinetic energy and the radius of a remnant. A discussion is given that the pressure in the hot gas, produced by supernova explosions, could be sufficiently high to support against the gravitational contraction in the initial phase of the Galaxy.Evolution of supernova remnantHeavy element abundance
東北大学の論文
1980-06-01