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

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

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...440l..59f&link_type=abstract

Astronomy and Astrophysics, Volume 440, Issue 2, September III 2005, pp.L59-L62

Astronomy and Astrophysics

Astrophysics

39

Sun: Corona, Flares, Oscillations, X-Rays, Gamma Rays

Scientific paper

We report the first observation at high spatial resolution of long-period quasi-periodic pulsations (QPP) of X-ray 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.

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