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Title:
G33.6 + 0.1 - A shell type supernova remnant with unusual structure
Authors:
Velusamy, T.; Becker, R. H.; Seward, F. D.
Affiliation:
AA(Tata Institute of Fundamental Research, Udhagamandalan, India), AB(California, University, Davis; Lawrence Livermore National Laboratory, Livermore), AC(Smithsonian Astrophysical Observatory, Cambridge, MA)
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 102, Aug. 1991, p. 676-682. (AJ Homepage)
Publication Date:
08/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, VERY LARGE ARRAY (VLA), X RAY IMAGERY, EMISSION SPECTRA, H II REGIONS, RADIO ASTRONOMY, RADIO EMISSION
DOI:
10.1086/115901
Bibliographic Code:
1991AJ....102..676V

Abstract

The morphology of Supernova Remnant G33.6 + 0.1 (Kes 79) has been studied in the X-rays with Einstein and in the radio wavelengths using the VLA. Multifrequency high resolution observations of the VLA at 327, 1500, and 5000 MHz are used to study the radio spectrum and polarization. The radio emission shows well formed outer shell structure and very bright central emission. Although the overall distribution of spectral index (about -0.6 to -0.75) is consistent with that of shell type remnants, the bright filamentary emission along the 'inner ring' has relatively flatter spectrum (alpha about -0.4). Both radio and X-rays show strong central emission; existence of a plerion near the center cannot be ruled out. The X-ray image does not show the characteristic limb brightening for shell type SNRs. The X-ray and radio morphology may be understood in terms of very thick shell and the bright central emission as due to reverse shock.

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