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Coronal magnetograms of solar active regions

Published online by Cambridge University Press:  14 March 2005

B. I. Ryabov ,
V. M. Bogod ,
G. B. Gelfreikh ,
V. P. Maksimov ,
F. Drago ,
B. I. Lubyshev ,
N. G. Peterova ,
T. P. Borisevich  and
D. A. Bezrukov
B. I. Ryabov
Affiliation:
Institute of Astronomy of the University of Latvia, Boulevard Rainis 19 Riga, LV-1586, Latvia email: [email protected]
V. M. Bogod
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, 357147 Karachaevo-Cherkessia, Russia email: [email protected]
G. B. Gelfreikh
Affiliation:
Pulkovo Astronomical Observatory, Pulkovskoe shosse 65, 196140 Sankt-Petersburg, Russia email: [email protected]
V. P. Maksimov
Affiliation:
Institute of Solar-Terrestrial Physics, Lermontov str.126, 664033 Irkutsk, Russia email: [email protected]
F. Drago
Affiliation:
University of Florence, Department of Astronomy and Space Science, Largo Fermi 5, 50125, Florence, Italy email: [email protected]
B. I. Lubyshev
Affiliation:
Institute of Solar-Terrestrial Physics, Lermontov str.126, 664033 Irkutsk, Russia email: [email protected]
N. G. Peterova
Affiliation:
Special Astrophysical Observatory, Nizhnij Arkhyz, 357147 Karachaevo-Cherkessia, Russia email: [email protected]
T. P. Borisevich
Affiliation:
Pulkovo Astronomical Observatory, Pulkovskoe shosse 65, 196140 Sankt-Petersburg, Russia email: [email protected]
D. A. Bezrukov
Affiliation:
Ventspils International Radio Astronomy Center, Akademijas laukums 1, Riga LV-1050, Latvia email: [email protected]
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Abstract

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A series of coronal magnetograms, related to the active region NOAA 9068 is derived using the effects of the quasi-transverse (QT-) propagation at microwaves. In the assumption that the product of the electron density $N$ and the scale of magnetic divergence $L_d$ is constant and equal to $10^{18}$ cm$^{-2}$, the sensitivity of the measurements peaks at $B(G) \approx 180 \, \lambda^{-4/3} (cm)$, where $\lambda$ is the observational wavelength. The radio maps of the Sun taken with the Solar Siberian Radio Telescope (SSRT) at $\lambda = 5.2$ cm were sampled and converted into the 2D coronal magnetograms supplying absolute values of the total magnetic vector $\vec B$ in the range 10-30 G. Each coronal magnetogram covers the portion of the microwave source in the active region affected by the QT-propagation conditions in the corona.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS223 , June 2004 , pp. 215 - 218
Copyright
© 2004 International Astronomical Union