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16. Some effects of hydromagnetic waves in the solar atmosphere

Published online by Cambridge University Press:  18 July 2016

J. H. Piddington
J. H. Piddington*
Affiliation:
Division of Radiophysics, C.S.I.R.O., Sydney, Australia

Abstract

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A hitherto undisclosed source of absorption of hydromagnetic waves, due to the presence of neutral atoms, is investigated quantitatively. In the chromosphere the rate of absorption due to this effect may be 1010 times greater than that due to ordinary viscosity.

General solar heating, due to hydromagnetic waves caused by granules, is investigated and order-of-magnitude agreement with observational data is found.

The new effect is discussed in connexion with heating near sunspots and with flares.

Type
Part II: Solar Electrodynamics
Information
Symposium - International Astronomical Union , Volume 6: Electromagnetic Phenomena in Cosmical Physics , 1958 , pp. 141 - 149
Copyright
Copyright © Cambridge University Press 1958 

References

1. Piddington, J. H. Mon. Not. R. Astr. Soc. 114, 638, 1954.CrossRefGoogle Scholar
2. Cowling, T. G. ‘The dissipation of magnetic energy in an ionized gas’, Mon. Not. R. Astr. Soc. 116, 114, 1956.Google Scholar
3. Piddington, J. H. ‘Solar atmospheric heating by hydromagnetic waves’, Mon. Not. R. Astr. Soc. 116, 314, 1956.Google Scholar
4. Piddington, J. H. ‘Galactic turbulence and the origins of cosmic rays and the galactic magnetic field’, Aust. J. Phys. (in the press).Google Scholar
5. Piddington, J. H. ‘Hydromagnetic waves in ionized gas’, Mon. Not. R. Astr. Soc. 115, 671, 1955.Google Scholar
6. Alfvén, H. Cosmical Electrodynamics (Oxford, Clarendon Press, 1950).Google Scholar
7. Piddington, J. H. Phil. Mag. 46, 1037, 1955.CrossRefGoogle Scholar
8. Biermann, L. Z. Astrophys. 25, 161, 1948.Google Scholar
9. Bullard, E. C. Vistas in Astronomy , vol. 1, ed. Beer, A., (London, Pergamon Press, 1955).Google Scholar
10. Waldmeier, M. and Müller, H. Z. Astrophys. 27, 58, 1950.Google Scholar
11. Piddington, J. H. and Minnett, H. C. Aust. J. Sci. Res. A 4, 131, 1951.Google Scholar
12. Ellison, M. A. Mon. Not. R. Astr. Soc. 109, 3, 1949.CrossRefGoogle Scholar
13. van de Hulst, H. C. Problems of cosmical aerodynamics , I.U.T.A.M. and I.A.V., Paris 1951; Central Air. Documents Office, Dayton, Ohio, 1951.Google Scholar
14. Thompson, W. B. Proc. Roy. Soc. A , 233, 402, 1955.Google Scholar
15. Wild, J. P., Roberts, J. A. and Murray, J. D. Nature, Lond. 173, 532, 1934.Google Scholar