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Westerbork Observations of the Galactic Supernova Remnants IC 443 and Tycho

Published online by Cambridge University Press:  14 August 2015

R. M. Duin ,
R. G. Strom  and
H. van der Laan
R. M. Duin
Affiliation:
Sterrewacht, Leiden, The Netherlands
R. G. Strom
Affiliation:
Sterrewacht, Leiden, The Netherlands
H. van der Laan
Affiliation:
Sterrewacht, Leiden, The Netherlands

Abstract

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Continuum observations of IC 443 were made at 21 cm with a resolution of 23″×59″. The appearance in the radio continuum is very similar to the optical appearance. Since the radio emission is nonthermal, this requires a mechanism that can enhance the synchrotron volume emissivity within thermal filaments, which emit strong optical radiation. We suggest compression of gas and magnetic fields in a shock.

Tycho's remnant has been observed both at 21 cm (resolution 24″ × 27″) and at 6 cm (resolution 7″ × 8″). Most of the fine scale structure is resolved. The similarity at the two wavelengths indicates a remarkable constancy in the spectral index of features down to a scale of 20″.

Type
Part 3: Supernova Remnants
Information
Symposium - International Astronomical Union , Volume 60: Galactic Radio Astronomy , 1974 , pp. 355 - 361
Copyright
Copyright © Reidel 1974 

References

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