Magnetic Reconnection Rate and Particle Acceleration of two-ribbon Flares

Details Magnetic Reconnection Rate and Particle Acceleration of two-ribbon Flares Magnetic Reconnection Rate and Particle Acceleration of two-ribbon Flares

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.3903j&link_type=abstract

American Astronomical Society Meeting 204, #39.03; Bulletin of the American Astronomical Society, Vol. 36, p.714

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We recently developed a new imaging processing technique, which applies region growing and adaptive boundary-base methods (Qu, M., 2004), to derive ribbon separation speed of two-ribbon flares automatically. From that, we can derive two important parameters of two-ribbon flares: the electric field inside the reconnecting current sheet (RCS), and the rate of magnetic flux involved in the reconnection (φ c = (∂ )/(∂ t) ∫ Bn da) in the low corona. For the M1.5 flare event on May 21, 2002, and the M8.7 flare event on July 26, 2002, the derived rate of magnetic reconnection is about 8× 1018 and 6× 1018 Mx/sec while the maximum electric field is 8 and 4 V/cm, respectively. The time profile of electric field and reconnection rate are in good correlation with the time derivative of the GOES soft X-ray light curve and the accompanying CME acceleration. For another two-ribbon flare event on September 27, 2000, which was not visible in GOES soft X-ray light curve, the magnetic reconnection rate is only 0.5× 1018 Mx/sec. Our results support the earlier report that there is a physical link between the mass acceleration and the magnetic reconnection rate in flares/CMEs (Qiu, J., et al., 2004).

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