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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparison of 30 THz impulsive burst time development to microwaves, H alpha, EUV, and GOES soft X-rays

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Author(s):
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Miteva, R. [1, 2] ; Kaufmann, P. [3, 1] ; Cabezas, D. P. [1] ; Cassiano, M. M. [1] ; Fernandes, L. O. T. [1] ; Freeland, S. L. [4] ; Karlicky, M. [5] ; Kerdraon, A. [6] ; Kudaka, A. S. [1] ; Luoni, M. L. [7] ; Marcon, R. [8, 9] ; Raulin, J. -P. [1] ; Trottet, G. [6] ; White, S. M. [10]
Total Authors: 14
Affiliation:
[1] Univ Prebiteriana Mackenzie, Sch Engn, Ctr Radio Astron & Astrophys, Sao Paulo, SP - Brazil
[2] Bulgarian Acad Sci, Space Res & Technol Inst, BU-1113 Sofia - Bulgaria
[3] Univ Estadual Campinas, Ctr Semicond Components, Campinas, SP - Brazil
[4] Lockheed Martin Solar & Astrophys Lab, Palo Alto, CA 94304 - USA
[5] Acad Sci Czech Republic, Inst Astron, CS-25165 Ondrejov - Czech Republic
[6] LESIA Observ Paris, F-92190 Meudon - France
[7] CONICET UBA, IAFE, Buenos Aires, DF - Argentina
[8] Univ Estadual Campinas, Gleb Wataghin Phys Inst, Campinas, SP - Brazil
[9] Bernard Lyot Solar Observ, Campinas, SP - Brazil
[10] Space Vehicles Directorate, Air Force Res Labs, Albuquerque, NM 87117 - USA
Total Affiliations: 10
Document type: Journal article
Source: Astronomy & Astrophysics; v. 586, FEB 2016.
Web of Science Citations: 3
Abstract

The recent discovery of impulsive solar burst emission in the 30 THz band is raising new interpretation challenges. One event associated with a GOES M2 class flare has been observed simultaneously in microwaves, Ha, EUV, and soft X-ray bands. Although these new observations confirm some features found in the two prior known events, they exhibit time profile structure discrepancies between 30 THz, microwaves, and hard X-rays (as inferred from the Neupert effect). These results suggest a more complex relationship between 30 THz emission and radiation produced at other wavelength ranges. The multiple frequency emissions in the impulsive phase are likely to be produced at a common flaring site lower in the chromosphere. The 30 THz burst emission may be either part of a nonthermal radiation mechanism or due to the rapid thermal response to a beam of high-energy particles bombarding the dense solar atmosphere. (AU)

FAPESP's process: 13/24155-3 - Solar flare diagnostic in an unprecedented frequency range from microwaves to THz frequencies: challenges for interpretation (flat)
Grantee:Carlos Guillermo Giménez de Castro
Support type: Research Projects - Thematic Grants