Abrupt Longitudinal Magnetic Field Changes During A Flare Observed By Hmi And Gong

Details Abrupt Longitudinal Magnetic Field Changes During A Flare Observed By Hmi And Gong Abrupt Longitudinal Magnetic Field Changes During A Flare Observed By Hmi And Gong

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.2226p&link_type=abstract

American Astronomical Society, SPD meeting #42, #22.26; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We characterize the photospheric longitudinal magnetic field changes that occurred during the 6 November 2010 M5.4 flare observed by both the Helioseismic and Magnetic Imager (HMI) and the Global Oscillation Network Group (GONG). We compare maps of the field changes as well as pixel-by-pixel mosaic plots of the field against time across the active region. The HMI data show larger-amplitude field changes and more complex spatial structure and temporal variation than the GONG data. Besides obvious differences in spatial resolution and seeing conditions, these discrepancies might be due to differences in the structure of the photosphere at the different formation heights of the absorption lines used in measuring the magnetic field strength.

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