Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Yakunina, G. V."'
Autor:
Bruevich, E. A., Yakunina, G. V.
Publikováno v:
Geomagnetizm and Aeronomy, 2019
Studies in the extreme ultraviolet (EUV) and X-ray ranges of the solar spectrum are important due to the active role of radiation of these ranges in the formation of the Earth's ionosphere. Photons of the EUV range are completely absorbed in the uppe
Externí odkaz:
http://arxiv.org/abs/1912.10736
The solar activity in the current, that is, the 24-th, sunspot cycle is analyzed. Cyclic variations in the sunspot number (SSN) and radiation fluxes in various spectral ranges have been estimated in comparison with the general level of the solar radi
Externí odkaz:
http://arxiv.org/abs/1804.10768
Autor:
Bruevich, E. A., Yakunina, G. V.
The flare activity and the ultraviolet emission of the sun during its 24-th cycle are analysed. As compared to cycles 21-23, where the most powerful flares were observed during the decay phase, in cycle 24 the greatest number of powerful flares (>X2.
Externí odkaz:
http://arxiv.org/abs/1711.06262
The large (X-ray class > M1) and very large (X-ray class >X1) flares (according to the observations of GOES-15 and Preliminary data from Current Catalog of Flare Events) in solar activity cycle 24 were analyzed. The monthly average values of optical
Externí odkaz:
http://arxiv.org/abs/1706.01421
The analysis of the effect of the hysteresis, which manifests itself in an ambiguous relationship of radiation from the photosphere, chromosphere and corona on the rise and decline phases of the solar and stellar activity cycles have done. Some indic
Externí odkaz:
http://arxiv.org/abs/1607.08543
Autor:
Bruevich, E. A., Yakunina, G. V.
The analysis of the observations of solar activity indexes SSN (NOAA Sunspot Numbers), the radio flux at a wavelength of 10.7 cm (F10.7) and the solar constant (TSI) during the cycles 22 - 24 is presented. We found a decrease of the observed values o
Externí odkaz:
http://arxiv.org/abs/1504.02226
Prior to 1947, the activity of the Sun was assessed by the relative numbers of sunspots (W). The 10.7 cm radio emission (frequency of 2.8 GHz) for observations of the variability of radiation of chromosphere and the lower corona (F10.7) became used f
Externí odkaz:
http://arxiv.org/abs/1401.7033
Autor:
Bruevich, E. A., Yakunina, G. V.
A stable cyclicity of correlation coefficients Kcorr for some solar activity indices versus F10,7 was found after monthly averages values analysis. These indices are: Wolf numbers, 10,7 cm radio flux F10,7, 0,1-0,8 nm background, the total solar irra
Externí odkaz:
http://arxiv.org/abs/1106.4640
Autor:
Bruevich, E. A., Yakunina, G. V.
The monthly average values of the main solar activity indices such as Wolf numbers (W), 10,7 cm radio flux (F10,7), 0,1-0,8 nm background, total solar irradiance and Mg II UV-index (280 nm core to wing ratio) were studied for 23 activity cycle. The c
Externí odkaz:
http://arxiv.org/abs/1102.5502
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