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Title:
The peculiar X-ray morphology of the supernova remnant G292.0+1.8 - Evidence for an asymmetric supernova explosion
Authors:
Tuohy, I. R.; Burton, W. M.; Clark, D. H.
Affiliation:
AA(Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon, England), AB(Science and Engineering Research Council, Rutherford Appleton Laboratory, Didcot, Oxon, England)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 260, Sept. 15, 1982, p. L65-L68. (ApJL Homepage)
Publication Date:
09/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
PECULIAR STARS, STELLAR EVOLUTION, STELLAR ROTATION, SUPERNOVA REMNANTS, X RAY SOURCES, HEAO 2, SHOCK WAVES, STELLAR ENVELOPES, STELLAR MODELS
Comment:
A&AA ID. AAA032.125.028
DOI:
10.1086/183871
Bibliographic Code:
1982ApJ...260L..65T

Abstract

A high-resolution X-ray image from the Einstein Observatory of the young supernova remnant G292.0+1.8 (MSH 11-54), previously noted as peculiar in terms of its spectral and morphological properties at optical and radio wavelengths, also shows an unusual X-ray morphology. Instead of a limb-brightened X-ray shell characteristic of most supernova remnants, the remnant consists of a central bar-like feature superposed on an ellipsoidal disk of approximately uniform surface brightness. The bar emission is attributed to a ring of oxygen-rich material ejected in the equatorial plane of a massive rotating progenitor, and the uniform disk component to emission from material with roughly cosmic composition heated by the accompanying blast wave. This interpretation provides strong observational support for the rotating precursor model of a Type II supernova discussed by Woosley and Weaver.

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