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Models for X-ray Emission from Tycho’s Remnant

Published online by Cambridge University Press:  12 April 2016

Barham W. Smith  and
Eric M. Jones
Barham W. Smith
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico, USA
Eric M. Jones
Affiliation:
Los Alamos National Laboratory, Los Alamos, New Mexico, USA

Abstract

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We reexamine the X-ray emission from Tycho’s remnant using results from hydrodynamic models computed with a detailed spherically symmetric code. The observed synchrotron radio contours (Green and Gull 1983) appear to require a cloudy circumstellar medium (Dickel and Jones, 1985; Dickel, Eilek, and Jones 1987), thus we explore the X-ray emission properties of similar models. We find that they tend to produce broad shells of X-ray emission that resemble the observed X-ray map of Tycho (Seward, Gorenstein, and Tucker 1983). A simple hydrodynamic model can satisfy both radio and X-ray observations, but it has little similarity to the evolution of remnants in cloudy media dominated by thermal conduction (McKee and Ostriker 1977). More work needs to be done to ensure that the spectrum as well as the X-ray map can be modeled with the same cloudy circumstellar medium, although we believe it will not be difficult to obtain as good a statistical agreement with the spectral data as other models have achieved (e.g. Hamilton, Sarazin, and Szymkowiak 1986).

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 101: Supernova Remnants and the Interstellar Medium , 1988 , pp. 133 - 136
Copyright
Copyright © Cambridge University Press 1988

References

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