Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Altyntsev, A. T."'
Autor:
Alissandrakis, Costas E., Fleishman, Gregory D., Fedenev, Viktor V., White, Stephen M., Altyntsev, Alexander T.
We report for the first time the detection of thermal free-free emission from post-flare loops at 34GHz in images from the Nobeyama Radioheliograph (NoRH). We studied 8 loops, 7 of which were from regions with extremely strong coronal magnetic field
Externí odkaz:
http://arxiv.org/abs/2406.14638
Autor:
Lysenko, Alexandra L., White, Stephen M., Zhdanov, Dmitry A., Meshalkina, Nataliia S., Altyntsev, Aleksander T., Motorina, Galina G., Fleishman, Gregory D.
Publikováno v:
The Astrophysical Journal, 2023, Volume 954, Issue 2, id.122, 12 pp
We identify a set of ~100 "cold" solar flares and perform a statistical analysis of them in the microwave range. Cold flares are characterized by a weak thermal response relative to nonthermal emission. This work is a follow up of a previous statisti
Externí odkaz:
http://arxiv.org/abs/2309.03993
Autor:
Meshalkina N. S., Altyntsev A. T.
Publikováno v:
Solar-Terrestrial Physics, Vol 10, Iss 3, Pp 11-17 (2024)
Analysis of GOES data for the SOL2012-06-29T04:09 flare, class C4.6, shows a thermal character of the energy release for several minutes before the impulsive stage. Plasma heating to temperatures above 10 MK leads to the appearance of plasma jets alo
Externí odkaz:
https://doaj.org/article/e2b2de41da5543248c6e10524d7dc727
Autor:
Meshalkina N. S., Altyntsev A. T.
Publikováno v:
Solar-Terrestrial Physics, Vol 9, Iss 4, Pp 17-24 (2023)
A distinctive feature of the September 6, 2012 event was that sources of narrow-band (2–4 GHz) sub-second pulses (SSP) were observed in small areas of flare loops with so-called bright ultraviolet knots with high plasma density up to 1011 10¹¹ cm
Externí odkaz:
https://doaj.org/article/52a13dd507ef491f80d0c9c8b24f2790
Publikováno v:
Solar-Terrestrial Physics, Vol 9, Iss 3, Pp 102-111 (2023)
Radio observations of weak events are one of the promising methods for studying energy release and non-thermal processes in the solar corona. The development of instrumental capabilities allows for radio observations of weak transient coronal events,
Externí odkaz:
https://doaj.org/article/2d5dbbb901f243dfa4fff6a2775753bf
Publikováno v:
Solar-Terrestrial Physics, Vol 9, Iss 2, Pp 71-77 (2023)
We discuss results of test observations of the 3–6 GHz range array of the Siberian Radio Heliograph (SRH). A method for calibrating brightness temperatures of images was verified using measurements of the brightness temperature of the quiet Sun at
Externí odkaz:
https://doaj.org/article/e7793d23d8e547e598bebc49a3eb0bfd
Autor:
Grechnev, V. V., Meshalkina, N. S., Uralov, A. M., Kochanov, A. A., Lesovoi, S. V., Myshyakov, I. I., Kiselev, V. I., Zhdanov, D. A., Altyntsev, A. T., Globa, M. V.
Publikováno v:
Solar Physics, 295(2020), 128
On 23 July 2016 after 05:00\,UTC, the first 48-antenna stage of the Siberian Radioheliograph detected two flares of M7.6 and M5.5 GOES importance that occurred within half an hour in the same active region. Their multi-instrument analysis reveals the
Externí odkaz:
http://arxiv.org/abs/2009.10350
Autor:
Altyntsev, Alexander T., Meshalkina, Nataliia S., Lysenko, Alexandra L., Fleishman, Gregory D.
Particle acceleration in solar flares remains an outstanding problem in solar physics. It is yet unclear which of the acceleration mechanisms dominates and how exactly is the excessive magnetic energy transferred to the nonthermal and other forms of
Externí odkaz:
http://arxiv.org/abs/1909.03593
Akademický článek
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Autor:
Grechnev, V. V., Lesovoi, S. V., Kochanov, A. A., Uralov, A. M., Altyntsev, A. T., Gubin, A. V., Zhdanov, D. A., Ivanov, E. F., Smolkov, G. Ya., Kashapova, L. K.
Publikováno v:
JASTP 2018, vol. 174, pp. 46-65
The first 48-antenna stage of the Siberian Radioheliograph (SRH) started single-frequency test observations early in 2016, and since August 2016 it routinely observes the Sun at several frequencies in the 4-8 GHz range with an angular resolution of 1
Externí odkaz:
http://arxiv.org/abs/1805.02564