Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Kobanov, N. I."'
Autor:
Chelpanov, A. A., Kobanov, N. I.
Publikováno v:
Solar Physics (2022), vol. 297, Article id.154
Registering periodic variations of spectral line widths serves as the main method for observing torsional Alfv\'{e}n waves. Theoretically, the method seems valid, yet it entails a number of caveats when applied to data. For instance, the amplitudes o
Externí odkaz:
http://arxiv.org/abs/2212.13710
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:
http://arxiv.org/abs/1607.06175
Autor:
Kolobov, D. Y., Kobanov, N. I., Chelpanov, A. A., Kochanov, A. A., Anfinogentov, S. A., Chupin, S. A., Myshyakov, I. I., Tomin, V. E.
In this study we combine the multiwavelength ultraviolet -- optical (Solar Dynamics Observatory, SDO) and radio (Nobeyama Radioheliograph, NoRH) observations to get further insight into space-frequency distribution of oscillations at different atmosp
Externí odkaz:
http://arxiv.org/abs/1505.02857
Oscillations Above Sunspots and Faculae: Height Stratification and Relation to Coronal Fan Structure
Oscillation properties in two sunspots and two facular regions are studied using Solar Dynamics Observatory (SDO) data and ground-based observations in the SiI 10827 and HeI 10830 lines. The aim is to study different-frequency spatial distribution ch
Externí odkaz:
http://arxiv.org/abs/1411.6258
Publikováno v:
A&A 554, A146 (2013)
Context. An analysis of the oscillations above sunspots was carried out using simultaneous ground-based and Solar Dynamics Observatory (SDO) observations (SiI 10827A, HeI 10830A, FeI 6173A, 1700A, HeII 304A, FeIX 171A). Aims. Investigation of the spa
Externí odkaz:
http://arxiv.org/abs/1305.4718
Publikováno v:
Astronomy & Astrophysics, 525, A41 (2011)
Context. The height structure of 3-min oscillations over sunspots is studied in the context of the recently discovered effect of height inversion: over the umbra, the spatial location of the maximum of chromospheric 3-min oscillation power correspond
Externí odkaz:
http://arxiv.org/abs/1111.6676
An analysis of line-of-sight velocity oscillation in nine solar faculae was undertaken with the aim of studying of phase relations between chromosphere (He i 10830 A line) and photosphere (Si i 10827 A line) five-minute oscillations. We found that ti
Externí odkaz:
http://arxiv.org/abs/1110.1438
Autor:
Kobanov, N. I., Pulyaev, V. A.
Publikováno v:
Solar Physics 2011, Volume 268, Number 2, Pages 329-334
We found that oscillations of LOS velocity in H-alpha are different for various parts of faculae regions. Power spectra show that the contribution of low-frequency modes (1.2 - 2 mHz) increase at the network boundaries. Three and five- minute periods
Externí odkaz:
http://arxiv.org/abs/1110.1444
Publikováno v:
Solar Physics, volume 270, pp. 175-189, 2011
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:
http://arxiv.org/abs/1102.1074
Autor:
Chelpanov, A. A.1 (AUTHOR) chelpanov@iszf.irk.ru, Kobanov, N. I.1 (AUTHOR)
Publikováno v:
Astronomy Reports. Apr2020, Vol. 64 Issue 4, p363-368. 6p.