Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsp51c..03t&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SP51C-03
Physics
7529 Photosphere
Scientific paper
Liu et al. (2006) presented the observation of rapid penumbra decay associated with a number of X-class flares. As the Evershed flows are closely associated with morphology of sunspot penumbra, in this work, we use the state-of-art Hinode data to track Evershed flow in flaring active regions as well as shear flows close to the flaring neutral line. This paper concentrates on the study of AR10930 around the time of the X3.4 flare time on December 13, 2006. We utilize the seeing-free data from Hinode SOT G-band data as the tracer to obtain the horizontal component of the Evershed flows by local correlation tracking. We find that: (1) The penumbra decay appears obviously in this active region associated with the X3.4 flare. (2) The Evershed flow decreases slightly immediately following the flare, indicating that magnetic fields become more vertical associated with the flare. In addition, we will discuss the evolution of shear flows near the neutral line of this delta spot leading to and following the flare.
Abramenko Valentina I.
Shine Richard A.
Tan Chenhao
Wang Hai-Hong
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