Ionization of the lower ionosphere during the x-ray solar flare on September 6, 2017

2018 ◽  
Author(s):  
Iliya Ryakhovskiy ◽  
Boris Gavrilov ◽  
Andrey Lyakhov ◽  
Yuri Poklad ◽  
Susanna Bekker ◽  
...  
Keyword(s):  
Solar Flare ◽  
Lower Ionosphere ◽  
X Ray

A Parameterized Model of X‐Ray Solar Flare Effects on the Lower Ionosphere and HF Propagation

Radio Science ◽  
2019 ◽  
Vol 54 (2) ◽  
pp. 168-180 ◽  
Author(s):  
Edlyn V. Levine ◽  
Peter J. Sultan ◽  
Lucien J. Teig
Keyword(s):  
Solar Flare ◽  
Lower Ionosphere ◽  
X Ray ◽  
Hf Propagation ◽  
Parameterized Model ◽  
Solar Flare Effects

Diagnostics of the Solar X-Flare Impact on Lower Ionosphere through the VLF-NAA Signal Recordings

2011 ◽  
Vol 20 (4) ◽  
Author(s):  
Aleksandra Kolarski ◽  
Davorka Grubor ◽  
Desanka Šulić
Keyword(s):  
Wave Propagation ◽  
Solar Flare ◽  
Lower Ionosphere ◽  
Signal Amplitude ◽  
Lower Edge ◽  
X Ray ◽  
The Earth ◽  
Reflection Height ◽  
Propagation Parameters ◽  
Delay Variations

AbstractAn analysis of four solar flare X-ray irradiance effects on VLF signal amplitude and phase delay variations on the NAA/24.0 kHz signal trace during the period from 2005 September to 2006 December was carried out. Solar flare data were taken from the GOES12 satellite one-minute listings. For the VLF data, recordings at the Institute of Physics, Belgrade were used. It was found that solar flare events affect VLF wave propagation in the Earth-ionosphere waveguide lowering the changes of the ionosphere electron density height profiles. This follows from the variation during the solar flare events of the following propagation parameters: the sharpness of the lower edge of the ionosphere and the reflection height.

Diagnostics of solar flare hard X-ray sources

Solar Physics ◽  
1978 ◽  
Vol 58 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Peter Hoyng ◽  
Joshua W. Knight ◽  
Daniel S. Spicer
Keyword(s):  
Solar Flare ◽  
X Ray

scholarly journals Using the maximum X-ray flux ratio and X-ray background to predict solar flare class

Space Weather ◽  
2015 ◽  
Vol 13 (5) ◽  
pp. 286-297 ◽  
Author(s):  
L. M. Winter ◽  
K. Balasubramaniam
Keyword(s):  
Solar Flare ◽  
Flux Ratio ◽  
X Ray ◽  
X Ray Background

scholarly journals Electron Bremsstrahlung Hard X-Ray Spectra, Electron Distributions, and Energetics in the 2002 July 23 Solar Flare

2003 ◽  
Vol 595 (2) ◽  
pp. L97-L101 ◽  
Author(s):  
Gordon D. Holman ◽  
Linhui Sui ◽  
Richard A. Schwartz ◽  
A. Gordon Emslie
Keyword(s):  
Solar Flare ◽  
X Ray ◽  
Electron Bremsstrahlung ◽  
Electron Distributions

Correlations of solar-flare electron events with radio and X-ray emission from the sun

1968 ◽  
Vol 46 (10) ◽  
pp. S757-S760 ◽  
Author(s):  
R. P. Lin
Keyword(s):  
Solar Flare ◽  
Solar Radio ◽  
Interplanetary Space ◽  
The Sun ◽  
Radio Bursts ◽  
Radio Observations ◽  
X Ray ◽  
Type Iii ◽  
Electron Event ◽  
Burst Emission

The > 40-keV solar-flare electrons observed by the IMP III and Mariner IV satellites are shown to be closely correlated with solar radio and X-ray burst emission. In particular, intense type III radio bursts are observed to accompany solar electron-event flares. The energies of the electrons, the total number of electrons, and the size of the electron source at the sun can be inferred from radio observations. The characteristics of the electrons observed in interplanetary space are consistent with these radio observations. Therefore these electrons are identified as the exciting agents of the type III emission. It has been noted that the radio and X-ray bursts are part of the flash phase of flares. The observations indicate that a striking feature of the flash phase is the production of electrons of 10–100 keV energies.

scholarly journals The frequency of stellar X-ray flares from a large-scale XMM-Newton sample

2015 ◽  
Vol 11 (S320) ◽  
pp. 134-137
Author(s):  
John P. Pye ◽  
Simon R. Rosen
Keyword(s):  
Solar System ◽  
Solar Flare ◽  
Space Weather ◽  
White Light ◽  
Large Scale ◽  
The Sun ◽  
X Ray ◽  
Cool Star ◽  
Exoplanetary Systems ◽  
Solar Type

AbstractWe present estimates of cool-star X-ray flare rates determined from the XMM-Tycho survey (Pyeet al. 2015, A&A, 581, A28), and compare them with previously published values for the Sun and for other stellar EUV and white-light samples. We demonstrate the importance of applying appropriate corrections, especially in regard to the total, effective size of the stellar sample. Our results are broadly consistent with rates reported in the literature for Kepler white-light flares from solar-type stars, and with extrapolations of solar flare rates, indicating the potential of stellar X-ray flare observations to address issues such as ‘space weather’ in exoplanetary systems and our own solar system.

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