Quasi-periodic pulsations in solar flares: new clues from the Fermi Gamma-Ray Burst Monitor

Author： Gruber D. Lachowicz P. Bissaldi E. Briggs M. S. Connaughton V. Greiner J. van der Horst A. J. Kanbach G. Rau A. Bhat P. N. Diehl R. von Kienlin A. Kippen R. M. Meegan C. A. Paciesas W. S. Preece R. D. Wilson-Hodge C.

Publisher： Edp Sciences

E-ISSN： 1432-0746|533|issue|A61-A61

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.533, Iss.issue, 2011-08, pp. : A61-A61

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Abstract

Aims. In the past four decades, it has been observed that solar flares display quasi-periodic pulsations (QPPs) from the lowest, i.e. radio, to the highest, i.e. gamma-ray, frequencies in the electromagnetic spectrum. It remains unclear which mechanism creates these QPPs. In this paper, we analyze four bright solar flares that display compelling signatures of quasi-periodic behavior and were observed with the Gamma-Ray Burst Monitor (GBM ) onboard the Fermi satellite. Because GBM covers over three decades in energy (8 keV to 40 MeV), it is regarded as a key instrument in our attempt to understand the physical processes that drive solar flares.