A search for oscillating loops in Solar-B XRT observations

Details A search for oscillating loops in Solar-B XRT observations A search for oscillating loops in Solar-B XRT observations

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..247..147s&link_type=abstract

Waves & Oscillations in the Solar Atmosphere: Heating and Magneto-Seismology, Proceedings of the International Astronomical Unio

Astronomy and Astrophysics

Astronomy

Scientific paper

Between November 2006 and March 2007, on several occasions, XRT has been taking high-cadence one or two filter observations of prominent active regions on the disk. We took these datasets and conducted a quick search for acoustic brightness oscillation in loops. We concentrated our search on flaring active regions. Here we present the preliminary results of this search. We found one active region - NOAA 10953 from 27 April - 02 May 2007 that had indications of acoustic oscillations with periods around 5 min, as well as multiples of this period, and one 40 min period that we associate with periodic heating of the loops. An interesting result is that all the loops in the active region seemed to oscillate with the same set of periods, only the power in the FFT was different and maybe dependent on the magnetic field strength.

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