d. bezrukov ventspils international radio astronomy center latvia
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D. Bezrukov Ventspils International Radio Astronomy Center LATVIA. Recent Advances in Solar Physics at VIRAC: Analysis of Solar Active Regions on the Base of Microwave Observations. Tartu 2011. Coronal Magnetography through Quasi-Transverse Propagation of Microwaves - PowerPoint PPT PresentationTRANSCRIPT
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Recent Advances in Solar Physics at VIRAC:
Analysis of Solar Active Regions on the Base of
Microwave ObservationsD. Bezrukov
Ventspils International Radio Astronomy Center
LATVIA
Tartu 2011
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Coronal Magnetography through Quasi-Transverse Propagation of Microwaves
Analysis of a Stable Sunspot with Sharp Changes in Ordinary Mode Radiation at Microwaves
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.0.5 02
ln 102.05 B 3/14/32 ][
Coronal Magnetography through Quasi-Transverse Propagation of Microwaves
Ryabov, B.I., Pilyeva, N.A., Alissandrakis C.E., Shibasaki, K., Bogod, V.M., Garaimov, V.I., Gelfreikh, G.B. 1999, Solar Phys., 185, 157
Bezrukov D.A., Ryabov B.I., Bogod V.M., Gelfreikh G.B., and all, “On the technique of coronal magnetography through quasi-transverse propagation of microwaves”, Baltic Astronomy, 2005, vol.14, N 1, pp.83-103
B.I. Ryabov, V.M. Bogod, G.B. Gelfreikh, V.P. Maksimov, F. Drago, B.I. Lubyshev, N.G. Peterova, T.P. Borisevich, D.A. Bezrukov, “Coronal magnetograms of solar active regions”, Multi-Wave Investigations of Solar Activity Proceedings IUA Symposium, No. 223, 2004.
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QTR
Time dependence of polarization inversion fits the model properties of QT-region. NOAA 9068
NoRH maps & KPNO magnetograms
Model prediction of QT-region
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daily coronal magnetograms of the NOAA 9068
Daily 2D coronal magnetograms of the NOAA 9068
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3D QT-surface positions determined at B=21 Gs for NOAA 9415
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Model Analysis of a Stable Sunspot with Sharp Changes in Ordinary Mode Radiation at
Microwaves
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AR 10325 during March 30 - April 2, 2003 RATAN-600 r.c.p. (red) and l.c.p. (blue)
λ = 2.24 cm 2.32 cm 2.67 cm 2.74 cm
March 30
March 31
April 1
April 2
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AR 10325 on March 31, April 2 and 4 of 2003 Nobeyama Radio Heliograph (r.c.p. and l.c.p.)
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AR 10325 on 2003 April 2 SOHO CDS (EUV lines) over MDI (white light)
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D. A. Bezrukov, B. I. Ryabov, N. G. Peterova, N. A. Topchilo, “Sharp Changes in the Ordinary Mode Microwave Emission from a Stable Sunspot: Model Analysis”, Latvian
Journal of Physics and Technical Sciences, 2011, N 2
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Solar Observations by VIRAC RT-32 Radio Telescopecurrent status
VIRAC radio telescope RT-322 channels x 16 sub bands spectral polarimeter for 6.3-9.3 GHz band
Time-wavelength chart overlapping for NoRH, SSRT, RATAN-600 and VIRAC RT-32
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Thank you!