Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Bruevich, E. A."'
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
Autor:
Bruevich, E. A., Bruevich, V. V.
The analysis of long-term variations of several solar activity indices (AI) since in last 40 years has been performed. We studied the AI which characterize the fluxes from different areas in solar atmosphere. Our consideration of mutual correlations
Externí odkaz:
http://arxiv.org/abs/1812.11723
We analyze the X-ray emission and chromospheric activity of Sun-like stars of F, G and K spectral classes (late-type stars) studied in the framework of the HK project. More powerful coronas are possessed by stars displaying irregular variations of th
Externí odkaz:
http://arxiv.org/abs/1807.06954
Autor:
Bruevich, E. A., Bruevich, V. V.
Solar flare activity in cycle 24 is studied. Satellite observations of x-ray fluxes from GOES-15 and UV emission lines from the SDO/EVE experiment are used. The most powerful flares of cycle 24 in classes X9.3 and X8.2 in September 2017 are compared
Externí odkaz:
http://arxiv.org/abs/1807.01271
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
We applied the method of continuous wavelet-transform to the time-frequency analysis to the sets of observations of relative sunspot numbers, sunspot areas and to 6 Mount Wilson HK-project stars with well-defined magnetic cycles. Wavelet analysis of
Externí odkaz:
http://arxiv.org/abs/1609.05335
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
The atmospheric activity of the Sun and Sun-like stars is analyzed involving observations from HK-project at the Mount Wilson Observatory, the California and Carnegie Planet Search Program at the Keck and Lick Observatories and the Magellan Planet Se
Externí odkaz:
http://arxiv.org/abs/1605.08578