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Title:
Expansion of the supernova remnant 3C 10 /Tycho/ and its implications for models of young remnants
Authors:
Strom, R. G.; Goss, W. M.; Shaver, P. A.
Affiliation:
AA(Stichting Radiostralinaj van Zon en Milkweg, Dwingeloo, Netherlands), AB(Groningen, Rijksuniversiteit, Groningen, Netherlands), AC(European Southern Observatory, Garching, West Germany)
Publication:
Royal Astronomical Society, Monthly Notices, vol. 200, Aug. 1982, p. 473-487. Research supported by the Nederlandse Organisatie voor Zuiver-Wetenschappelijk Onderzoek. (MNRAS Homepage)
Publication Date:
08/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
RADIAL VELOCITY, STELLAR MODELS, SUPERNOVA REMNANTS, CALIBRATING, ERRORS, SHOCK WAVE INTERACTION, STELLAR EVOLUTION
Comment:
A&AA ID. AAA032.125.007
Bibliographic Code:
1982MNRAS.200..473S

Abstract

The remnant of Tycho Brahe's supernova (3C 10) was observed with the Westerbork telescope at 21 cm in 1971 and 1979, and these measurements have been used to determine the radial expansion rate. The average value obtained is within 0.026 of 0.256 arcsec/yg, with the individual radio and optical data points agreeing well within the errors. The apparent discrepancy in average values is primarily the result of a low expansion speed at the position of the most prominent nebulosity, and this is attributed to deceleration caused by the higher density of material. While the expansion speed only marginally exceeds that predicted by the Sedov solution, the confirmation lent by the optical data suggests a possible real effect. Either the remnant is not yet fully in the adiabatic phase, or the dynamics are being modified by the evaporation of neutral material behind the shock front. It is clear that swept-up material now dominates the dynamics of 3C 10. No significant change in flux density was detected at a level which favors models where particle acceleration/field amplification are occurring over that of simple adiabatic expansion.

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