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Ionospheric effects of X-rays from discrete galactic sources

Published online by Cambridge University Press:  14 August 2015

S. Ananthakrishnan ,
S. C. Chakravarty  and
K. R. Ramanathan
S. Ananthakrishnan
Affiliation:
Physical Research Laboratory, Ahmedabad, India
S. C. Chakravarty
Affiliation:
Physical Research Laboratory, Ahmedabad, India
K. R. Ramanathan
Affiliation:
Physical Research Laboratory, Ahmedabad, India

Abstract

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Observation of the field strength of low frequency radio waves (164 kHz) transmitted during night hours from Tashkent and received at Ahmedabad show increased absorption around the sidereal times of the transit of the X ray stars Sco X-1 and Tau X-1. It is estimated that the ionization in the D region produced by these X-ray stars can explain the observed changes in field strength.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 37: Non-Solar X- and Gamma-Ray Astronomy , 1970 , pp. 146 - 150
Copyright
Copyright © Reidel 1970 

References

Ananthakrishnan, S. and Ramanathan, K. R.: 1969, Nature (in press).Google Scholar
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Labeyrie, J.: 1968, in Electromagnetic Radiation in Space (ed. by Emming, J. G.), D. Reidel Publ. Co., Dordrecht, Holland, p. 125.Google Scholar
Whitten, R. C. and Poppoff, I. G.: 1965, Physics of the Lower Ionosphere, Prentice-Hall, Inc., p. 30.Google Scholar