Ionization effects from cosmic sources of X-rays in the lower atmosphere

Sharma, D. P. ; Rao, U. R. ; Kasturirangan, K. (1978) Ionization effects from cosmic sources of X-rays in the lower atmosphere Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences, 87 (7). pp. 155-163. ISSN 0253-4126

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Detectable ionization effects in the ionospheric D-region from individual, strong and steady x-ray sources such as Sco X-1 and transient x-ray sources such as Cet X-2 have been reported by us and many others previously based on the field strength and phase variations of the VLF data. As a follow up to these investigations, we have examined the integrated effects of many of the known x-ray sources discovered by UHURU, ANS, Ariel V and SAS-3 satellites, in order to understand the totality of their effects. These effects are examined in the present paper for 0° and +38° geographic latitudes corresponding to midnight conditions and for different times of the year. Such effects are compared, in turn, with those of the known steady sources responsible for D-region ionization such as Lyman-alpha and galactic cosmic radiations. The results are presented as profiles of electron production rates as a function of height. Our study leads to the conclusion that there should be detectable annual variations of the electron density which are pronounced around May-August. Further, the results of the computations on electron production rates corresponding to the spectacular x-ray nova A0620-00 are also included in the present paper.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:D-region Ionization; X-ray Sources; X-ray Nova
ID Code:16569
Deposited On:15 Nov 2010 09:23
Last Modified:17 May 2016 01:18

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