Abstract
This article reviews the use of gyroresonance emission at radio wavelengths to measure coronal magnetic fields. The spiralling motion of electrons in the 200–2000 G fields in the solar corona produces sufficient opacity to render the corona optically thick, making it easy to recognize such sources in microwave images from their coronal brightness temperatures. Where gyroresonance sources are present they may be used as sensitive probes of the magnetic field strength above active regions, and this unique capability is one of the strengths of radio observations. Typically a gyroresonance radio source shows the temperature on an optically thick surface of constant magnetic field within the corona. Since each radio frequency corresponds to a different magnetic field strength, the coronal structure can be “peeled away” by using different frequencies.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Akhmedov, Sh. B., Gelfreikh, G. B., Bogod, V. M., & Korzhavin, A. N. 1982, Solar Phys, 79
Alissandrakis, C. E. & Kundu, M. R. 1984, A&A, 139, 271
Alissandrakis, C. E., Kundu, M. R., & Lantos, P. 1980, A&A, 82, 30
Amari, T., Boulmezaoud, T. Z., & Mikic, Z. 1999, A&A, 350, 1051
Aschwanden, M. J. & Bastian, T. S. 1994, ApJ, 426, 425
Bornatici, M., Cano, R., de Barbieri, O., & Engelmann, F. 1983, Nucl. Fusion, 23, 1153
Bray, R. J. & Loughhead, R. E. 1964, Sunspots, Chapman & Hall, London
Brosius, J. W. & Holman, G. D. 1989, ApJ, 342, 1172
Chiuderi Drago, F., Alissandrakis, C. E., & Hagyard, M. 1987, Solar Phys, 112, 89
Gary, D. E. & Hurford, G. J. 1994, ApJ, 420, 903
Gary, D. E., Zirin, H., & Wang, H. 1990, ApJ, 355, 321
Gary, G. A. 1989, ApJ Supp., 69, 323.
Gelfreikh, G. B. & Lubyshev, B. I. 1979, Sov. Astron., 23, 316
Ginzburg, V. L. & Zheleznyakov, V. V. 1961, Sov. Astron., 5, 1
Hurford, G. J. 1986, in Solar Flares and Coronal Physics Using P/OF as a Research Tool, (Tandberg-Hanssen, E., Wilson, R. M., and Hudson, H. S., eds.), NASA Conf. Pub. 2421, 191
Jiao, L., McClymont, A. N., & Mikić, Z. 1997, Solar Phys, 174, 311
Kakinuma, T. & Swarup, G. 1962, ApJ, 136, 975
Klimchuk, J. A. 2000, Solar Phys, 193, 53
Klimchuk, J. A. & Canfield, R. C. 1994, in Solar Active Region Evolution: Comparing Models with Observations, (Balasubramanian, K. S. & Simon, G. W., eds.), PASP Conf. Ser. 68, 233
Krüger, A., Hildebrandt, J., & Fürstenberg, F. 1985, A&A, 143, 72
Lantos, P. 1972, Solar Phys, 22, 387
Lee, J., McClymont, A. N., Mikić, Z., White, S. M., & Kundu, M. R. 1998, ApJ, 501, 853
Lee, J., White, S. M., Gopalswamy, N., & Kundu, M. R. 1997, Solar Phys, 174, 175
Lee, J., White, S. M., Kundu, M. R., Mikić, Z., & McClymont, A. N. 1999, ApJ, 510, 413
Lee, J. W., Hurford, G. J., & Gary, D. E. 1993, Solar Phys, 144, 45
Lin, H., Penn, M. J., & Tomczyk, S. 2000, ApJ, 541, L83
McClymont, A. N. & Mikić, Z. 1994, ApJ, 422, 899
Melrose, D. B. 1980, Plasma Astrophysics, Gordon and Breach, New York
Metcalf, T. R., Jiao, L., McClymont, A. N., Canfield, R. C., & Uitenbroek, H. 1995, ApJ, 439, 474
Mok, Y., Lionello, R., Mikic, Z., & Linker, J. A. 2004, ApJ, submitted.
Robinson, P. A. 1991, Solar Phys, 136, 343
Robinson, P. A. & Melrose, D. B. 1984, Aust. J. Phys., 37, 675
Schmahl, E. J., Kundu, M. R., Strong, K. T., Bentley, R. D., Smith, J. B., & Krall, K. R. 1982, Solar Phys, 80, 233
Schmelz, J. T., Holman, G. D., Brosius, J. W., & Willson, R. F. 1994, ApJ, 434, 786
Semel, M. & Skumanich, A. 1998, A&A, 331, 383
Shibasaki, K., Enome, S., Nakajima, H., Nishio, M., Takano, T., Hanaoka, Y., Torii, C., Sekiguchi, H.,, Kawashima, S., Bushimata, T., Shinohara, N., Koshiishi, H., Shiomi, Y., Irimajiri, Y., Leka, K. D., & Canfield, R. C. 1994, Publ. Astron. Soc. Japan, 46, L17
Vourlidas, A. 1996, Ph. D. thesis, New Mexico Inst. of Mining and Technology, unpublished.
White, S. M. & Kundu, M. R. 1997, Solar Phys, 174, 31
White, S. M., Kundu, M. R., & Gopalswamy, N. 1991, ApJ, 366, L43
White, S. M., Kundu, M. R., & Gopalswamy, N. 1992, ApJ Supp., 78, 599
Zheleznyakov, V. V. 1962, Sov. Astron. J., 6, 3
Zheleznyakov, V. V. 1970, Radio Emission of the Sun and the Planets, Pergamon Press Ltd., Oxford
Zlotnik, E. Ya. 1968a, Sov. Astron., 12, 245
Zlotnik, E. Ya. 1968b, Sov. Astron., 12, 464
Zlotnik, E. Ya., Kundu, M. R., & White, S. M. 1996, Radiophysics and Quantum Electronics, 39, 255
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2004 Kluwer Academic Publishers
About this chapter
Cite this chapter
White, S.M. (2004). Coronal Magnetic Field Measurements Through Gyroresonance Emission. In: Gary, D.E., Keller, C.U. (eds) Solar and Space Weather Radiophysics. Astrophysics and Space Science Library, vol 314. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2814-8_5
Download citation
DOI: https://doi.org/10.1007/1-4020-2814-8_5
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-2813-7
Online ISBN: 978-1-4020-2814-4
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)