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Are the Supernova Remnants of the LMC in the Adiabatic Phase?

Published online by Cambridge University Press:  04 August 2017

R. Fusco-Femiano  and
A. Preite-Martinez
R. Fusco-Femiano
Affiliation:
Istituto di Astrofisica Spaziale, Frascati, Italy
A. Preite-Martinez
Affiliation:
Istituto di Astrofisica Spaziale, Frascati, Italy

Extract

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A catalog of supernova remnants (SNRs) observed in the soft X-ray band 0.15–4.5 KeV by the imaging instruments on board the Einstein Observatory has been recently published by Mathewson et al. (1983). One of the conclusions in their paper is that SNRs in the LMC appear to evolve to large diameters much faster than predicted by the adiabatic expansion theory (Sedov 1959). This is based on the observed cumulative number-radius (N-R) relation that for the remnants in the LMC turns out to be approximatively linear. As suggested by Mathewson et al. (1983), a linear N-R relation can be obtained assuming a population of SNRs in the free-expansion phase (phase I, Woltjer 1972) expanding in a homogeneous medium. In the following we show that the X-ray surface brightness as a function of linear radius (Σ-R diagram) and the N-R relation can be alternatively explained assuming that the SNRs in the LMC are in the adiabatic phase.

Type
Supernova Remnants, Radio Continuum, X-ray Sources
Information
Symposium - International Astronomical Union , Volume 108: Structure and Evolution of the Magellanic Clouds , 1984 , pp. 315 - 316
Copyright
Copyright © Reidel 1984 

References

Fusco-Femiano, R., and Preite-Martinez, A. 1983, submitted to Ap. J. Google Scholar
Long, K.S., Helfand, D.J., and Grabelsky, D.A. 1981, Ap. J., 248, 925.CrossRefGoogle Scholar
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Sedov, L. I. 1959, Similarity and Dimensional Methods in Mechanics.Google Scholar
Woltjer, L. 1972, Ann. Rev. Astr. Ap., 10, 129.Google Scholar