Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...740...90v&link_type=abstract
The Astrophysical Journal, Volume 740, Issue 2, article id. 90 (2011).
Astronomy and Astrophysics
Astronomy
1
Sun: Corona, Sun: Flares, Sun: Oscillations
Scientific paper
We analyze light curves from the LYRA irradiance experiment on board PROBA2 during the flare of 2010 February 8. We see both long- and short-period oscillations during the flare. The long-period oscillation is interpreted in terms of standing slow sausage modes; the short-period oscillation is thought to be a standing fast sausage mode. The simultaneous presence of two oscillation modes in the same flaring structure allows for new coronal seismological applications. The periods are used to find seismological estimates of the plasma-β and the density contrast of the flaring loop. Also the wave mode number is estimated from the observed periods.
Berghmans David
de Groof Anik
Doorsselaere Tom Van
Goossens Marcel
Zender J. J.
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