Zobrazeno 1 - 10
of 43
pro vyhledávání: '"G. B. Gelfreikh"'
Publikováno v:
Solar Physics. 270:175-189
We present a new method that combines the results of an oscillation study made in optical and radio observations. The optical spectral measurements in photospheric and chromospheric lines of the line-of-sight velocity were carried out at the Sayan So
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::407d1e04a83e326836b944ac1c690bfa
https://doi.org/10.1007/s11207-011-9716-7
https://doi.org/10.1007/s11207-011-9716-7
Publikováno v:
Proceedings of the International Astronomical Union. 4:95-99
The observations of 3 and 5 minute oscillations in sunspots present information on propagation of MHD waves in the magnetic tubes of sunspots. We present a comparison of wavelet spectra of radio flux oscillations at λ = 1.76 cm and oscillations of l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c23ec8606df387a6d2fdd90ff42f4a96
https://doi.org/10.1017/s1743921309029147
https://doi.org/10.1017/s1743921309029147
Autor:
D. A. Bezrukov, G. B. Gelfreikh, V. P. Maksimov, B. I. Ryabov, V. M. Bogod, T. P. Borisevich, N. G. Peterova, F. Drago, B. I. Lubyshev
Publikováno v:
Proceedings of the International Astronomical Union. 2004:215-218
A series of coronal magnetograms, related to the active region NOAA 9068 is derived using the effects of the quasi-transverse (QT-) propagation at microwaves. In the assumption that the product of the electron density N and the scale of magnetic dive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4881d132efe713974754003398e900fb
https://doi.org/10.1017/s1743921304005629
https://doi.org/10.1017/s1743921304005629
Publikováno v:
Astronomy & Astrophysics. 389:624-628
An analysis of solar rotation as a function of heliographic latitude and time is made using daily radio maps of the Sun at the wavelength of 1.76 cm. Variations of the velocity as a function of the latitude during the period 1992{2001 have been studi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::245c7351db0b7fc20933d7faf7b933f9
https://doi.org/10.1051/0004-6361:20020664
https://doi.org/10.1051/0004-6361:20020664
Publikováno v:
Astronomy & Astrophysics. 389:618-623
Daily radio maps of the Sun at the wavelength of 1.76 cm were used to analyze the parameters of solar activity at all heliographic latitudes for the period 1992{2001. As a criterion of the level of solar activity, we analyzed the area/number of regio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3deff1472229c456e40859a90cb7a885
https://doi.org/10.1051/0004-6361:20020666
https://doi.org/10.1051/0004-6361:20020666
Publikováno v:
Chinese Journal of Astronomy and Astrophysics. 2:266-276
Radio observations of some active regions (ARs) obtained with the Nobeyama radioheliograph at λ = 1.76 cm are used for estimating the magnetic field strength in the upper chromosphere, based on thermal bremsstrahlung. The results are compared with t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::093eaabc094b7d2cfdda2d09fb24c2af
https://doi.org/10.1088/1009-9271/2/3/266
https://doi.org/10.1088/1009-9271/2/3/266
Publikováno v:
Physics and Chemistry of the Earth, Part C: Solar, Terrestrial & Planetary Science. 25:437-440
In this paper we present the arguments showing that the solar cycle must be studied as an essentially global process. Observations of polar faculae and magnetic fields have shown that the solar activity at high latitude presents an important part of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75b524c469b9f86f9cfe8543c82a5bac
https://doi.org/10.1016/s1464-1917(00)00052-0
https://doi.org/10.1016/s1464-1917(00)00052-0
Autor:
Kiyoto Shibasaki, V. M. Bogod, G. B. Gelfreikh, N. A. Pilyeva, V. Garaimov, B. I. Ryabov, C. E. Alissandrakis
Publikováno v:
Solar Physics. 185:157-175
The microwave circular polarization of the active region (AR) NOAA 7260 on 21 - 23 August 1992 is analyzed. Two-dimensional images at 1.76 cm with spatial resolution ofD 10 00 from the Nobeyama radioheliograph and one-dimensional scans at 9 wavelengt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5d7900828d526e80695f23056096541
https://doi.org/10.1023/a:1005114303703
https://doi.org/10.1023/a:1005114303703
Publikováno v:
Solar Physics. 170:253-264
A technique is proposed to estimate the magnetic field and its derivative in coronal layers above solar active regions. On the basis of the theory of quasi-transverse propagation of microwaves, the measurable degree of circular polarization is relate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::606e172a0dc1231639e9a9329c845e79
https://doi.org/10.1023/a:1004967202294
https://doi.org/10.1023/a:1004967202294
Autor:
V. M. Bogod, G. F. Vyalshin, V. I. Garaimov, V. N. Borovik, G. B. Gelfreikh, V. E. Abramov-Maksimov, V. G. Medar
Publikováno v:
Radiophysics and Quantum Electronics. 39:957-961
We present the results of measurements of magnetic fields above a sunspot at different altitudes of the solar atmosphere for a number of observation days. The data are based on simultaneous optical and radio observations in August, 1992. The existenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6a8692bd12f49eeb8a64ba0101244eb
https://doi.org/10.1007/bf02250972
https://doi.org/10.1007/bf02250972