Девятая ежегодная конференция «Физика плазмы в Солнечной системе» февраль 2014.

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Девятая ежегодная конференция «Физика плазмы в Солнечной системе» февраль 2014

Геометрия эксперимента радиозондирования околосолнечной плазмы с использованием космических аппаратов HELIOS-1 ( ) и HELIOS-2 ( ) Геометрия эксперимента радиозондирования околосолнечной плазмы с использованием космических аппаратов HELIOS-1 ( ) и HELIOS-2 ( ) Станции слежения: Goldstone (DSS 014) Canberra (DSS 043) Madrid (DSS 063) Effelsberg (DSS 069)

Квазипериодические флуктуации фарадеевского вращения плоскости поляризации в области ускорения солнечного ветра. Результат прошлого этапа исследований: Обнаружение квазипериодических осцилляций фарадеевского вращения пятиминутного диапазона. Результат прошлого этапа исследований: Обнаружение квазипериодических осцилляций фарадеевского вращения пятиминутного диапазона. Наземные пункты приема сигналов: Goldstone (США) Canberra (Австралия)

The Astrophysical Journal, 722: 1495–1503, 2010 October 20 doi: / X/722/2/1495 C The American Astronomical Society. All rights reserved. Printed in the U.S.A. CORONAL FARADAY ROTATION FLUCTUATIONS AND A WAVE / TURBULENCE-DRIVEN MODEL OF THE SOLAR WIND Joseph V. Hollweg 1, Steven R. Cranmer 2, and Benjamin D. G. Chandran 3 1 Space Science Center, Morse Hall, University of New Hampshire, Durham, NH 03824, USA; 2 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA; 3 Space Science Center and Department of Physics, Morse Hall, University of New Hampshire, Durham, NH 03824, USA; Received 2010 May 7; accepted 2010 August 21; published 2010 September 30 Hollweg et al. (1982, hereafter “H82”) showed that the observed FRFs agreed well with those predicted from a theoretical model of an Alfven wave-driven fast wind, but that model did not incorporate the aforementioned turbulent dissipation. Efimov et al. (1993) and Andreev et al. (1997a) similarly concluded that the observations are consistent with the presence of coronal magnetic field fluctuations with sufficient amplitudes to drive the solar wind, if the magnetic fluctuations are indeed Alfven waves. In this regard, it is noteworthy that the FRFs tend to have most power at periods of hours, suggesting a connection with the Alfven waves which are routinely observed by spacecraft.

НОВЫЕ ЗАДАЧИ ( ): 1.Выполнить сравнительный анализ материалов, полученных на различных фазах солнечной активности; 2.Определить характерные периоды вариаций фарадеевского вращения плоскости поляризации. НОВЫЕ ЗАДАЧИ ( ): 1.Выполнить сравнительный анализ материалов, полученных на различных фазах солнечной активности; 2.Определить характерные периоды вариаций фарадеевского вращения плоскости поляризации. Эксперименты радиозондирования SW сигналами космических аппаратов в период с 1975 г. по 1985 г. Hel ios-1

Геометрия эксперимента радиозондирования околосолнечной плазмы с использованием космических аппаратов HELIOS-1 ( ) и HELIOS-2 ( ) Геометрия эксперимента радиозондирования околосолнечной плазмы с использованием космических аппаратов HELIOS-1 ( ) и HELIOS-2 ( ) Станции слежения: Goldstone (DSS 014) Canberra (DSS 043) Madrid (DSS 063) Effelsberg (DSS 069) R=( )R s

Faraday rotation (FR) of the HELIOS–2 carrier signal recorded at the Goldstone station on 22 october The apparent solar offset of Helios–2 is given at the top. FARADAY ROTATION (DEGREES) Quasi-periodic fluctuations 17:00-19:30, Δ t=2.5 h (Goldstone)

The deviation of the Faraday rotation from the running average over ± 100 s for recording fragment between 17:00 and 19:30. The averaged period of quasi-periodic variations. FARADAY ROTATION (DEGREES) T = 1.6 ·10 3 s ; ν=0.625 mHz ΔΨ/ ≈ 0.06 Δ t=2.5 h (0.5 Δ t total )

Faraday rotation of the HELIOS-2 carrier signal recorded at the Madrid station on 23 October The average period of quasi-periodic variations T=1.65 hours. HELIOS-2 23 Oct 1979 DOY 296 INGRESS WEST LIMB R/R s Quasi-periodic fluctuations T=1.65 hours Δ t=1.76 h (0.2 Δ t total ) FARADAY ROTATION (DEGREES) UT (HOURS)

FARADAY ROTATION (DEGREES) Faraday rotation measurements with HELIOS–2 on 24 October 1979 at the ground stations Goldstone (red), Canberra (black) and Madrid (blue). Goldstone Canberra Madrid

FARADAY ROTATION (DEGREES) Simultaneous Faraday rotation measurements with HELIOS–2 on 24 October 1979 at the ground stations Goldstone (red) and Madrid (blue). The average period of quasi-periodic variations T ≈ 330 s. R/R s T = 0.33 ·10 3 s ; ν=3 mHz Δ t=1.77 ·10 3 s (0.24 Δ t total ) 10 3 s 0.77·10 3 s

Large scale quasi-periodic ( T 1 ≈ 165 min) FR variations. Small scale quasi-periodic ( T 2 ≈ 220 s) FR fluctuations are superimposed on large scale variations. FARADAY ROTATION (DEGREES) T 1 = 165 min T 2 = 220 s Δ t=15 min INGRESS WEST LIMB

FARADAY ROTATION (DEGREES) T = 220 s Δ t=15 min Quasi-periodic fluctuations of the Faraday rotation of 5-min band

FARADAY ROTATION (DEGREES) Faraday rotation measurements with HELIOS – 2 on 27/28 October 1979 at the ground stations Goldstone (red), Canberra (black) and Madrid (blue).

FARADAY ROTATION (DEGREES) Faraday rotation measurements with HELIOS – 2 on 27 October 1979 at the ground station Canberra

HELIOS-2 27 Oct 1979 DOY 300 EGRESS EAST LIMB FARADAY ROTATION (DEGREES) T 1 = 5 min T 2 = 3 min Quasi-periodic Faraday rotation fluctuations of the 5-min band (T 1 ) and 3-min band (T 2 ) at small heliocentric distances

FARADAY ROTATION (DEGREES) Quasi-periodic variations of the Faraday rotation, observed on 27/28 October 1979 at the ground stations Goldstone (red), Canberra (black) and Madrid (blue).

T2T2 T1T1 T1T1 T2T2 HELIOS-2 27 Oct 1979 DOY 300 EGRESS EAST LIMB FARADAY ROTATION (DEGREES) Superposition of the quasi-periodic of the FR fluctuations of the 20-min band (T 1 ) and 80-min band (T 2 )

Superposition of the quasi-periodic variations of the Faraday rotation with periods T 1 =20 min (these regions are shown by arrows) and T 2 =80 min for all time. SB  D · σ N 2/(p-2) · v T1T1 T1T1

FARADAY ROTATION (DEGREES) Quasi-periodic Faraday rotation variations of 2h-band during solar activity minimum. HELIOS-2 22 May 1976 DOY 143 EGRESS EAST LIMB (Effelsberg)

FARADAY ROTATION (DEGREES) Quasi-periodic Faraday rotation variations of 2h band during the period of the declining solar activity. HELIOS-2 22 DEC 1981 DOY 356 EGRESS EAST LIMB

Quasi-periodic Faraday rotation variations of 5-min band during the period of the declining solar activity. HELIOS-1 7 JAN 1983 DOY 007 INGRESS WEST LIMB T = 230 s Δ t=700 s FARADAY ROTATION (DEGREES)

Дисперсия флуктуаций фарадеевского вращения плоскости поляризации.

Скорость движения неоднородностей магнитного поля (альвеновские волны) V, км/с Теоретическая кривая

4.В 20% случаев регистрировались квазипериодические вариации с периодами, кратными 5 мин. Наибольшую интенсивность имеют вариации двухчасового диапазона. 5.Скорость движения неоднородностей магнитного поля изменяется в пределах от 320 км/с до 560 км/с в интервале гелиоцентрических расстояний ( )R S. 6.Флуктуации фарадеевского вращения обусловлены распространяющимися от Солнца альвеновскими волнами. 7.В рамках перспективных национальных космических проектов (IntergelioZond, Phobos-Grunt) целесообразно запланировать проведение комплексного исследования, включающего одновременное радиозондирование внешней короны Солнца линейно-поляризованными сигналами S-диапазона, сигналами с круговой поляризацией Х-диапазона с регистрацией в разнесенных на большое расстояние наземных пунктах следующих характеристик зондирующих радиосигналов: частоты несущих, амплитуды, фарадеевского вращения, группового запаздывания сигналов за счет плазмы. Регистрация радиосигналов может быть выполнена в наземных пунктах России, американской сети слежения за КА и австралийского пункта Европейского космического агентства.