Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pasj...55..313y&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.55, No.1, pp.313-320
Astronomy and Astrophysics
Astronomy
16
Sun: Chromosphere, Sun: Magnetic Fields, Sun: Uv Radiation
Scientific paper
Surge activities were observed at the edge of an emerging flux region. We studied the relations between the features around the surges in various data sets: magnetogram, Hα, G-band, UV, EUV, and soft X-rays. We showed that the surge activities in Hα and the brightenings in TRACE 1600Å images correlate well in both time and space with the cancellation of magnetic fluxes around an emerging flux region. In particular, at the onset of surge activity, a close correlation among them was clearly found. These facts are consistent with the magnetic reconnection model. The released energy through magnetic reconnection, which is estimated to be 1028 erg, is sufficiently large to produce surge activities. No prominent brightenings were observed in soft X-ray and EUV images during the surge activities. This may suggest that the energy releases occurred at a layer of high densities.
Kurokawa Hiroki
Shimojo Masumi
Shine Richard
Yoshimura Keiji
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