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Title:
X-ray observations of the supernova remnant W44
Authors:
Smith, A.; Jones, L. R.; Watson, M. G.; Willingale, R.; Wood, N.; Seward, F. D.
Affiliation:
AA(Leicester, University, England), AB(Leicester, University, England), AC(Leicester, University, England), AD(Leicester, University, England), AE(Leicester, University, England)
Publication:
Royal Astronomical Society, Monthly Notices (ISSN 0035-8711), vol. 217, Nov. 1, 1985, p. 99-104. (MNRAS Homepage)
Publication Date:
11/1985
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL MODELS, RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, X RAY SOURCES, HEAO 2, INTERSTELLAR MATTER, MOLECULAR CLOUDS, PLASMA TEMPERATURE, X RAY SPECTRA
Bibliographic Code:
1985MNRAS.217...99S

Abstract

The authors present Einstein Observatory X-ray observations of the supernova remnant W44 (G34.7-0.4). The X-ray morphology is centrally peaked and shows an anti-correlation with the radio shell. X-ray spectral data indicate a temperature for the emitting plasma of approximately 1 keV. The authors suggest a model for W44 in which the remnant is in its late adiabatic phase. The soft X-ray shell has become too cool to be observable through the intervening ISM, yet a hotter interior remains visible. W44 would then appear to fit in reasonably well with the generally accepted evolution of shell-like remnants and a Crab-like component is not required to explain the X-ray morphology.

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