Abstract
This work investigates the spatial relation between coronal X-ray sources and coherent radio emissions, both generally thought to be signatures of particle acceleration. Two limb events were selected during which the radio emission was well correlated in time with hard X-rays. The radio emissions were of the type of decimetric pulsations as determined from the spectrogram observed by Phoenix-2 of ETH Zurich. The radio positions were measured from observations with the Nançay Radioheliograph between 236 and 432 MHz and compared to the position of the coronal X-ray source imaged with RHESSI. The radio pulsations originated at least 30 – 240 Mm above the coronal hard X-ray source. The altitude of the radio emission increases generally with lower frequency. The average positions at different frequencies are on a line pointing approximately to the coronal hard X-ray source. Thus, the pulsations cannot be caused by electrons trapped in the flare loops, but are consistent with emission from a current sheet above the coronal source.
Energy Storage and Release through the Solar Activity Cycle – Models Meet Radio Observations Guest Editors: Christophe Marqué and Alexander Nindos.
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References
Aschwanden, M.J.: 1986, Solar Phys. 104, 57.
Aschwanden, M.J.: 2006, Physics of the Solar Corona, Praxis, Chichester.
Aschwanden, M.J., Benz, A.O.: 1986, Astron. Astrophys. 158, 102.
Aschwanden, M.J., Benz, A.O.: 1988, Astrophys. J. 332, 466.
Aurass, H., Landini, F., Poletto, G.: 2009, Astron. Astrophys. 506, 901.
Bárta, M., Karlický, M., Žemlička, R.: 2008, Solar Phys. 281, 173.
Battaglia, M., Benz, A.O.: 2006, Astron. Astrophys. 456, 751.
Battaglia, M., Benz, A.O.: 2009, Astron. Astrophys. 499, L33.
Benz, A.O.: 1980, Astrophys. J. 240, 892.
Benz, A.O.: 2002, Plasma Astrophysics: Kinetic Processes in Solar and Stellar Coronae, 2nd edn., Kluwer, Dordrecht.
Benz, A.O.: 2009, Landolt-Boernstein VI/4B, Springer, 4.1.2.8.
Benz, A.O., Wentzel, D.G.: 1981, Solar Phys. 94, 100.
Benz, A.O., Grigis, P.C., Csillaghy, A., Saint-Hilaire, P.: 2005, Solar Phys. 226, 121.
Covington, A.E.: 1951, J. Roy. Astron. Soc. Can. 45, 157.
Dabrowski, B.P., Benz, A.O.: 2009, Astron. Astrophys. 504, 565.
De Feiter, L.D., Fokker, A.D., Roosen, J.: 1959, Nature 184, 805.
Delaboudinière, J.-P., Artzner, G.E., Brunaud, J., Gabriel, A.H., Hochedez, J.F., Millier, F., et al.: 1995, Solar Phys. 162, 291.
Emslie, A.G., Kontar, E.P., Krucker, S., Lin, R.P.: 2003, Astrophys. J. 595, L107.
Fleishman, G.D., Stepanov, A.V., Yurovsky, Yu.F.: 1994, Solar Phys. 153, 403.
Fleishman, G.D., Bastian, T.S., Gary, D.E.: 2008, Astrophys. J. 684, 1433.
Gotwols, B.L.: 1972, Solar Phys. 25, 232.
Güdel, M., Benz, A.O.: 1988, Astron. Astrophys. Suppl. Ser. 75, 243.
Hill, S.M., Pizzo, V.J., Balch, C.C., Biesecker, D.A., Bornmann, P., Hildner, E., et al.: 2005, Solar Phys. 226, 255.
Hurford, G.J., Schmahl, E.J., Schwartz, R.A., Conway, A.J., Aschwanden, M.J., Csillaghy, A., et al.: 2002, Solar Phys. 210, 61.
Isliker, H., Benz, A.O.: 1994, Astron. Astrophys. Suppl. Ser. 104, 145.
Karlický, M., Bárta, M.: 2005, Space Sci. Rev. 121, 153.
Karlický, M., Zlobec, P., Mészárosová, H.: 2010, Solar Phys. 261, 281.
Kerdraon, A., Delouis, J.-M.: 1997, In: Trottet, G. (ed.) Coronal Physics from Radio and Space Observations, Lect. Not. Phys. 483, 192.
Khan, M., Vilmer, N., Saint-Hilaire, P., Benz, A.O.: 2002, Astron. Astrophys. 388, 363.
Kliem, B., Karlický, M., Benz, A.O.: 2000, Astron. Astrophys. 360, 715.
Krucker, S., Battaglia, M., Cargill, P.J., Fletcher, L., Hudson, H.S., MacKinnon, A., et al.: 2008, Astron. Astrophys. Rev. 16, 155.
Kundu, M.R., Roberts, J.A., Spencer, C.L., Kuiper, J.W.: 1961, Astrophys. J. 133, 255.
Lehany, F.J., Yabsley, D.E.: 1948, Nature 161, 645.
Li, Y., Fleishman, G.D.: 2009, Astrophys. J. Lett. 701, L52.
Lin, R.P., Dennis, B.R., Hurford, G.J., Smith, D.M., Zehnder, A., Harvey, P.R., et al.: 2002, Solar Phys. 210, 3.
Magdalenic, J., Zlobec, P., Vrsnak, B., Messerotti, M., Aurass, H., Temmer, M.: 2003, ESA SP 535, 619.
McLean, D.J., Sheridan, K.V., Stewart, R.T., Wild, J.P.: 1971, Nature 234, 140.
Messmer, P., Benz, A.O., Monstein, C.: 1999, Solar Phys. 187, 335.
Mészárosová, H., Rybák, J., Karlický, M.: 2011, Astron. Astrophys. 525, A88.
Nakariakov, V.M., Foullon, C., Myagkova, I.N., Inglis, A.R.: 2010, Astrophys. J. 708, L47.
Nindos, A., Aurass, H., Klein, K.-L., Trottet, G.: 2008, Solar Phys. 253, 3.
Pick, M.: 1986, Solar Phys. 104, 19.
Roberts, B., Edwin, P.M., Benz, A.O.: 1984, Astrophys. J. 279, 857.
Saint-Hilaire, P., Benz, A.O.: 2003, Solar Phys. 216, 205.
Tan, B., Zhang, Y., Tan, C., Liu, Y.: 2010, Astrophys. J. 723, 25.
Thompson, A.R., Maxwell, A.: 1962, Astrophys. J. 136, 546.
Vilmer, N., Krucker, S., Lin, R.P., RHESSI team: 2002, Solar Phys. 210, 261.
Young, C.W., Spencer, C.L., Moreton, G.E., Roberts, J.A.: 1961, Astrophys. J. 133, 243.
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Benz, A.O., Battaglia, M., Vilmer, N. (2011). Location of Decimetric Pulsations in Solar Flares. In: Marqué, C., Nindos, A. (eds) Energy Storage and Release through the Solar Activity Cycle. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4403-9_4
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