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Nocturnal absorption of radio waves due to the ionisation produced by X-rays from Sco X-1 and Tau X-1 in the lower ionosphere

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Abstract

The night-time attenuation of LF radio waves of frequency 164 kHz transmitted from Tashkent and received at Ahmedabad has been found to have a sidereal time variation which is associated with the transits of the X-ray stars Sco X-1 and Tau X-1.

Using the full-wave admittance method of Barron and Budden for calculating the intensity and polarisation of LF radio waves reflected from ionosphere during night-time when the atmosphere is irradiated by X-rays from Sco X-1 and Tau X-1, the attenuation of 164 kHz waves transmitted from Tashkent and received at Ahmedabad, has been calculated and compared with the observed results. The agreement is reasonably satisfactory.

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Authors and Affiliations

  1. Physical Research Laboratory, Ahmedabad-9, India

    S. C. Chakravarty

Authors
  1. S. C. Chakravarty
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Communicated by Dr. K. R. Ramanathan,f.a.sc.

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Chakravarty, S.C. Nocturnal absorption of radio waves due to the ionisation produced by X-rays from Sco X-1 and Tau X-1 in the lower ionosphere. Proc. Indian Acad. Sci. 74, 99–114 (1971). https://doi.org/10.1007/BF03047146

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  • DOI: https://doi.org/10.1007/BF03047146

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