NDLI: Spatial Characterization of a Flare Using Radio Observations and Magnetic Field Topology

Content Provider	Springer Nature Link
Author	Cristiani, G. Martinez, G. Mandrini, C. H. Giménez De Castro, C. G. Da Silva, C. W. Rovira, M. G. Kaufmann, P.
Copyright Year	2007
Abstract	Using magnetograms, EUV and Hα images, Owens Valley Solar Array microwave observations, and 212-GHz flux density derived from the Solar Submillimeter Telescope data, we determine the spatial characteristics of the 1B/M6.9 flare that occurred on November 28, 2001, starting at 16:26 UT in active region (AR) NOAA 9715. This flare is associated with a chromospheric mass ejection or surge observed at 16:42 UT in the Hα images. We compute the coronal magnetic field under the linear force-free field assumption, constrained by the photospheric data of the Michelson Doppler Imager and loops observed by the Extreme Ultraviolet Imaging Telescope. The analysis of the magnetic field connectivity allows us to conclude that magnetic field reconnection between two different coronal/chromospheric sets of arches was at the origin of the flare and surge, respectively. The optically thick microwave spectrum at peak time shows a shape compatible with the emission from two different sites. Fitting gyrosynchrotron emission to the observed spectrum, we derive parameters for each source.
Starting Page	271
Ending Page	281
Page Count	11
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	240
Issue Number	2
e-ISSN	1573093X
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2007-03-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Flares Relation to magnetic field Magnetic reconnection Observational signatures Radio burst Association with flares Dynamic spectrum Surges Astronomy Extraterrestrial Physics, Space Sciences Astrophysics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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