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X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations \ud

By C. (Claire) Foullon, E. (Erwin) Verwichte, V. M. (Valery M.) Nakariakov and L. (Lyndsay) Fletcher


We report the first observation at high spatial resolution of long-period quasi-periodic pulsations (QPP) of X-ray\ud radiation during solar flares, made possible with the Reuven Ramaty High Energy Solar Spectroscopic Imager(RHESSI), supported by complementary data at other wavelengths from space-based and ground-based telescopes. Evidence for the presence of a transequatorial loop possibly responsible for the detected periodicity connected with its kink mode is found. Our findings suggest that QPP can be interpreted as a periodic pumping of electrons in a compact flaring loop, modulated by oscillations in a magnetically linked and larger loop acting as a long-period magnetohydrodynamic resonator.\u

Topics: QB
Publisher: EDP Sciences
Year: 2005
OAI identifier:

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