Foullon, C. (Claire), Verwichte, E. (Erwin), Nakariakov, V. M. (Valery M.) and Fletcher, L. (Lyndsay) (2005) X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations. Astronomy & Astrophysics, Vol.440 (No.2). L59-L62. doi:10.1051/0004-6361:200500169 ISSN 0004-6361.

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Abstract

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.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Magnetohydrodynamics, Sun -- Corona, Solar flares, Solar oscillations
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Official Date:	September 2005
Dates:	Date Event September 2005 Published
Volume:	Vol.440
Number:	No.2
Page Range:	L59-L62
DOI:	10.1051/0004-6361:200500169
Status:	Peer Reviewed
Access rights to Published version:	Open Access (Creative Commons)
Funder:	European Space Agency (ESA), United States. National Aeronautics and Space Administration (NASA)

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