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Trottet, G.; Raulin, J.-P.; Giménez de Castro, G.; Lüthi, T.; Caspi, A.; Mandrini, C.H.; Luoni, M.L.; Kaufmann, P. "Origin of the Submillimeter Radio Emission During the Time-Extended Phase of a Solar Flare" (2011) Solar Physics. 273(2):339-361
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Abstract:

Solar flares observed in the 200-400 GHz radio domain may exhibit a slowly varying and time-extended component which follows a short (few minutes) impulsive phase and can last for a few tens of minutes to more than one hour. The few examples discussed in the literature indicate that such long-lasting submillimeter emission is most likely thermal bremsstrahlung. We present a detailed analysis of the time-extended phase of the 27 October 2003 (M6.7) flare, combining 1-345 GHz total-flux radio measurements with X-ray, EUV, and Hα observations. We find that the time-extended radio emission is, as expected, radiated by thermal bremsstrahlung. Up to 230 GHz, it is entirely produced in the corona by hot and cool materials at 7-16 MK and 1-3 MK, respectively. At 345 GHz, there is an additional contribution from chromospheric material at a few 104 K. These results, which may also apply to other millimeter-submillimeter radio events, are not consistent with the expectations from standard semiempirical models of the chromosphere and transition region during flares, which predict observable radio emission from the chromosphere at all frequencies where the corona is transparent. © 2011 Springer Science+Business Media B.V.

Registro:

Documento: Artículo
Título:Origin of the Submillimeter Radio Emission During the Time-Extended Phase of a Solar Flare
Autor:Trottet, G.; Raulin, J.-P.; Giménez de Castro, G.; Lüthi, T.; Caspi, A.; Mandrini, C.H.; Luoni, M.L.; Kaufmann, P.
Filiación:Observatoire de Paris, LESIA-CNRS UMR 8109, Univ. P and M Curie and Paris-Diderot, Observatoire de Meudon, 92195 Meudon, France
CRAAM Universidade Presbiteriana Mackenzie, São Paulo, Brazil
Hexagon Metrology, Leica Geosystem AG, Moenchmattweg 5, 5035 Unterenfelden, Switzerland
Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, United States
Instituto de Astronomía y Física del Espacio, CONICET-UBA, CC. 67 Suc. 28, 1428 Buenos Aires, Argentina
Facultad de Ciencias Exactas y Naturales, FCEN-UBA, Buenos Aires, Argentina
Centro de Componentes Semicondutores, Universidade Estadual de Campinas, Campinas, Brazil
Palabras clave:Chromosphere, active; Flares, relation to magnetic field; Radio bursts, association with flares; Radio bursts, microwave; X-ray bursts, association with flares
Año:2011
Volumen:273
Número:2
Página de inicio:339
Página de fin:361
DOI: http://dx.doi.org/10.1007/s11207-011-9875-6
Título revista:Solar Physics
Título revista abreviado:Sol. Phys.
ISSN:00380938
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00380938_v273_n2_p339_Trottet

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Citas:

---------- APA ----------
Trottet, G., Raulin, J.-P., Giménez de Castro, G., Lüthi, T., Caspi, A., Mandrini, C.H., Luoni, M.L.,..., Kaufmann, P. (2011) . Origin of the Submillimeter Radio Emission During the Time-Extended Phase of a Solar Flare. Solar Physics, 273(2), 339-361.
http://dx.doi.org/10.1007/s11207-011-9875-6
---------- CHICAGO ----------
Trottet, G., Raulin, J.-P., Giménez de Castro, G., Lüthi, T., Caspi, A., Mandrini, C.H., et al. "Origin of the Submillimeter Radio Emission During the Time-Extended Phase of a Solar Flare" . Solar Physics 273, no. 2 (2011) : 339-361.
http://dx.doi.org/10.1007/s11207-011-9875-6
---------- MLA ----------
Trottet, G., Raulin, J.-P., Giménez de Castro, G., Lüthi, T., Caspi, A., Mandrini, C.H., et al. "Origin of the Submillimeter Radio Emission During the Time-Extended Phase of a Solar Flare" . Solar Physics, vol. 273, no. 2, 2011, pp. 339-361.
http://dx.doi.org/10.1007/s11207-011-9875-6
---------- VANCOUVER ----------
Trottet, G., Raulin, J.-P., Giménez de Castro, G., Lüthi, T., Caspi, A., Mandrini, C.H., et al. Origin of the Submillimeter Radio Emission During the Time-Extended Phase of a Solar Flare. Sol. Phys. 2011;273(2):339-361.
http://dx.doi.org/10.1007/s11207-011-9875-6