Abstract
OBSERVATIONS have been made at a wave-length of 3.7 m. with interferometers of different resolving powers to determine the distribution of radio brightness across the Andromeda nebula, M31, which has also been investigated at radio wave-lengths by Hanbury Brown and Hazard1. When observations are made with small movable aerials, errors are caused by reception of radiation from adjacent radio stars. Good discrimination was therefore obtained with the present measurements by using several different sections of the large Cambridge radio telescope2, although this method reduced the number of different axes and aerial spacings available. The relationship of the four axes used to the Andromeda nebula is shown in Fig. 1.
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References
Hanbury Brown, R., and Hazard, C., Mon. Not. Roy. Astro. Soc., 111, 357 (1951).
Ryle, M., and Hewish, A. (in preparation).
Wyse, A. B., and Mayall, N. U., Astrophys. J., 95, 24 (1942).
Westerhout, G., and Oort, J. H., Bull. Astro. Ned., 11, 323 (1951).
Shakeshaft, J. R., Phil. Mag. (in the press).
Baldwin, J. E. (in preparation).
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BALDWIN, J. Radio Emission from the Andromeda Nebula. Nature 174, 320–321 (1954). https://doi.org/10.1038/174320a0
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DOI: https://doi.org/10.1038/174320a0
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