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Coronal Broadening of the Crab Nebula 1969-71: Observations

Published online by Cambridge University Press:  25 April 2016

R. G. Blesing  and
P. A. Dennison
R. G. Blesing
Affiliation:
Department of Physics, University of Adelaide
P. A. Dennison
Affiliation:
Department of Physics, University of Adelaide
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Extract

A description was given in a previous paper of the first observations of the two-dimensional image of the Crab Nebula as it became broadened by the solar corona in June 1969. In this paper we describe further observations at 80 MHz during 1970 and 1971, again using the CSIRO Radioheliograph at Culgoora, N.S.W., and we discuss the derived values for radial and tangential broadening in relation to previous work at various phases of the solar cycle. Other methods of observing angular broadening have generally employed two or three interferometers at different position angles, and only the simplest model for the image could be assumed in interpreting the results. The radioheliograph, however, has the advantage of recording the complete two-dimensional image and also, simultaneously, the surrounding background.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 2 , Issue 2 , March 1972 , pp. 84 - 86
Copyright
Copyright © Astronomical Society of Australia 1972

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References

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