Electron production by solar Ly-α line radiation in the ionospheric D-region
arXiv:1403.1443 · doi:10.1016/j.asr.2013.12.042
Abstract
The hydrogen Ly-α line has a dominant influence in photo-ionization processes in the unperturbed terrestrial ionospheric D region. In this paper, we present a procedure of calculating the rate of photo-ionization induced by Ly-α photons based on relaxation of electron density after intensive perturbations like those caused by solar X flares. This theory is applied to the ends of relaxation periods following three cases of solar X flares from May 5, 2010, February 18, 2011 and March 24, 2011. The necessary data on low ionospheric plasma parameters were collected by the very low frequency (VLF) radio-wave technics. The electron concentration is calculated from the amplitude and phase of the VLF signal emitted by the DHO transmitter in Germany and recorded by a receiver located in Serbia.
9 pages, 6 figure, 2 tables
References in corpus (3)
- Altitude distribution of electron concentration in ionospheric D-region in presence of time-varying solar radiation flux
- Effective electron recombination coefficient in ionospheric D-region during the relaxation regime after solar flare from February 18, 2011
- The influence of solar spectral lines on electron concentration in terrestrial ionosphere
Cited by in corpus (5)
- Sensing the Earth's low ionosphere during solar flares using VLF signals and GOES X-ray data
- Low ionospheric reactions on tropical depressions prior hurricanes
- Diagnostics of plasma in the ionospheric D-region: detection and study of different ionospheric disturbance types
- Quiet-Sun hydrogen Lyman-alpha line profile derived from SOHO/SUMER solar-disk observations
- Ionospheric D-region temperature relaxation and its influences on radio signal propagation after solar X-flares occurrence