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Title:
Radio structure of the remnant of Tycho's supernova (SN 1572)
Authors:
Dickel, J. R.; van Breugel, W. J. M.; Strom, R. G.
Affiliation:
AA(Illinois, University, Urbana), AB(Lawrence Livermore National Laboratory, Livermore, CA), AC(Netherlands Foundation for Research in Astronomy, Dwingeloo)
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 101, June 1991, p. 2151-2159. (AJ Homepage)
Publication Date:
06/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
RADIO EMISSION, STELLAR STRUCTURE, SUPERNOVAE, BRIGHTNESS DISTRIBUTION, POLARIZED RADIATION, POWER SPECTRA, STELLAR MAGNETIC FIELDS, VERY LARGE ARRAY (VLA)
DOI:
10.1086/115837
Bibliographic Code:
1991AJ....101.2151D

Abstract

The radio emission from the remnant of Tycho's supernova of 1572 arises in a nearly circular, clumpy shell. A very distinct, thin bright rim just outside the main shell can be seen around most of the periphery of the remnant. The outer edge of radio emission, usually defined by this bright rim, coincides perfectly with the outer X-ray boundary. Most of the emission is polarized by a modest amount, with the outer rim particularly prominent. Observations at several wavelengths are used to map out the rotation measure at high angular resolution, and determine the intrinsic magnetic field direction. The magnetic field shows a somewhat cellular pattern but with a net radial orientation and a generally fairly low degree of polarization.

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