An Observational Study of the Relationship between CMEs and Flares

Details An Observational Study of the Relationship between CMEs and Flares An Observational Study of the Relationship between CMEs and Flares

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh61a0436m&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SH61A-0436

Physics

7513 Coronal Mass Ejections, 7519 Flares

Scientific paper

We present an observational study of the relationship between coronal mass ejections(CMEs) and flares occurred in NOAA Active Region 9236 on Novemver 24-25, 2000. For this work, we consider following two approaches. First, we have examined the relationship between CME kinematics and flare strength for four homologous CME-flare events which can produce a good statistical sample since these homologous events have almost the same projection effect and probably involve similar magnetic field structures. Second, we have directly estiamted the initial eruption speeds of a filament associated with the X1.8 flare using two sequences of Hα images (high-resolution blue wing and full-disk centerline) with a 1-minute time cadence and then compared them with GOES X-ray fluxes. As a result, we have found that: (1) there is a conspicuous correlation between the ejection speeds of CMEs in LASCO C2/C3 field of view and the peak fluxes of the associated flares and (2) the start of the filament eruption is timed about 10 min before the onset of the associated X1.8 flare. In this case, therefore, the flare cannot be a cause of the CME despite the kinematic correlation.

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