Zobrazeno 1 - 10
of 177
pro vyhledávání: '"N. I. Kobanov"'
Autor:
N. I. Kobanov, A. A. Chelpanov
Publikováno v:
Astronomy Reports. 64:363-368
We applied a new approach to measure the time delays of magnetohydrodynamic waves propagating in the solar atmosphere. A small flare in the flare region of the chromosphere served as a modulator of 3‑ and 5-minute oscillations. The oscillation ampl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e46bfb7efcf140ab9a3909ade5973a3c
https://doi.org/10.1134/s1063772920030026
https://doi.org/10.1134/s1063772920030026
Autor:
A. A. Chelpanov, N. I. Kobanov
For the first time, a multiwavelength investigation of the oscillation dynamics in a solar facula from its birth to decay was carried out. We performed spectral observations of active region NOAA 12744 at the Horizontal Solar Telescope of the Sayan S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a07532746e77dd12b218267128037c77
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 173:50-56
A small-scale flare SOL2012-09-21T02:19 (B2) occurred in a spotless active region that we observed at a ground-based telescope equipped with a spectrograph. During the flare, we registered an increase in absorption in the He I 10830 \AA\ line by 25%,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc9805c3225f6d3434d9bddf358e34de
https://doi.org/10.1016/j.jastp.2018.04.007
https://doi.org/10.1016/j.jastp.2018.04.007
Publikováno v:
Astronomy Letters. 43:844-853
In an effort to detect torsional oscillations, we have studied the periodic half-width variations for several spectral lines in solar faculae. The duration of the series being analyzed was from 40 to 150 min. We have determined the dominant frequenci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dd501b35a14916a765413dfe7664f9c
https://doi.org/10.1134/s1063773717110044
https://doi.org/10.1134/s1063773717110044
Autor:
N. I. Kobanov, A. A. Chelpanov
Publikováno v:
Solar Physics. 294
We studied oscillations related to flare SOL2012-09-21T02:19 in the transition region and chromosphere based on Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) and Solar Dynamics Observatory (SDO) data, as well as data from a ground-bas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78875090adc6d3f5d5d2ada8a8926ff5
https://doi.org/10.1007/s11207-019-1449-z
https://doi.org/10.1007/s11207-019-1449-z
Publikováno v:
Solar Physics. 291:3339-3347
Spatial distributions of the dominant oscillation frequency obtained for four sunspots show a feature shared by all the analysed levels of the solar atmosphere in these sunspots. This feature located in the inner penumbrae indicates that this region
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c2e13f135582a7569e1d86401ad11da
https://doi.org/10.1007/s11207-016-0953-7
https://doi.org/10.1007/s11207-016-0953-7
Publikováno v:
Astronomy Letters. 42:55-62
The oscillations of the half-width of the Ba II 4554 Ǻ and Ca II 8542 Ǻ spectral lines have been analyzed using observations at the base of solar coronal holes (CHs). The observed variations (~50 m Ǻ for Ca II and ~4 m Ǻ for Ba II) exceed conside
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8ba6d7966755fd49b23f2e4c0ebeeb8
https://doi.org/10.1134/s1063773716010047
https://doi.org/10.1134/s1063773716010047
Autor:
A. A. Chelpanov, N. I. Kobanov
On 21 September 2012, we carried out spectral observations of a solar facula in the Si i 10827 A, He i 10830 A, and H $\upalpha$ spectral lines. Later, in the process of analyzing the data, we found a small-scale flare in the middle of the time serie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::628d9430f1785a2011b02285cb167e07
http://arxiv.org/abs/1810.10153
http://arxiv.org/abs/1810.10153
Publikováno v:
Astronomy Reports. 59:968-973
The characteristics of oscillations of the intensity, magnetic field, andDoppler velocity in facular magnetic knots are compared with those at the facula periphery, where the magnetic field has a moderate intensity. The analysis is based on images in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d54e123410da55b53a1b32e5483f8d3
https://doi.org/10.1134/s1063772915090036
https://doi.org/10.1134/s1063772915090036
Autor:
N. I. Kobanov, A. A. Chelpanov
Publikováno v:
Astronomy Reports. 58:272-279
The power spectra of radial-velocity and intensity oscillations are analyzed using ground-based (the Si I 10 827 A and He I 10 830 A lines) and Solar Dynamics Observatory (the Fe I 6173, 1700 A, He II 304 A, and Fe IX 171 A lines) data, with the aim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::148073001f02792ed28b5681b467475a
https://doi.org/10.1134/s1063772914030056
https://doi.org/10.1134/s1063772914030056