Title
Comparison of 30 THz impulsive burst time development to microwaves, Hα, EUV, and GOES soft X-rays
Date Issued
01 February 2016
Access level
open access
Resource Type
journal article
Author(s)
Miteva R.
Kaufmann P.
Cassiano M.M.
Fernandes L.O.T.
Freeland S.L.
Karlický M.
Kerdraon A.
Kudaka A.S.
Luoni M.L.
Marcon R.
Raulin J.P.
Trottet G.
White S.M.
Mackenzie Presbyterian University
Publisher(s)
EDP Sciences
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, Hα, 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.
Volume
586
Language
English
OCDE Knowledge area
Astronomía
Scopus EID
2-s2.0-84956603961
Source
Astronomy and Astrophysics
ISSN of the container
00046361
Sponsor(s)
We thank R. V. Souza for help with the 30 THz data analysis. This work was partially supported by Brazilian agencies FAPESP (Proc. 2013/24155−3), CNPq, and Mackpesquisa, and the US agency AFOSR. D.P.C. acknowledges support from CAPES-PROSUP. M.K. acknowledges support from Grant P209/12/0103 (GAČR) and the EU FP7 project No. 606862 F-CHROMA. R.M. acknowledges CNPq project No. 23/2009.
Sources of information: Directorio de Producción Científica Scopus