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

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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. ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361:200500169

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 > 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

Identification Number:

10.1051/0004-6361:200500169

Status:

Peer Reviewed

Access rights to Published version:

Open Access

Funder:

European Space Agency (ESA), United States. National Aeronautics and Space Administration (NASA)

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