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Statistical relationship between solar flares and coronal mass ejections

Published online by Cambridge University Press:  01 September 2008

Seiji Yashiro  and
Nat Gopalswamy
Seiji Yashiro
Affiliation:
Interferometrics Inc., Herndon, Virginia 20171, USA email: Seiji.Yashiro@nasa.gov NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA email: Nat.Gopalswamy@nasa.gov The Catholic University of America, Washington, DC 20771, USA
Nat Gopalswamy
Affiliation:
NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA email: Nat.Gopalswamy@nasa.gov
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Abstract

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We report on the statistical relationships between solar flares and coronal mass ejections (CMEs) observed during 1996-2007 inclusively. We used soft X-ray flares observed by the Geostationary Operational Environmental Satellite (GOES) and CMEs observed by the Large Angle and Spectrometric Coronagraph (LASCO) on board the Solar and Heliospheric Observatory (SOHO) mission. Main results are (1) the CME association rate increases with flare's peak flux, fluence, and duration, (2) the difference between flare and CME onsets shows a Gaussian distribution with the standard deviation σ = 17 min (σ = 15 min) for the first (second) order extrapolated CME onset, (3) the most frequent flare site is under the center of the CME span, not near one leg (outer edge) of the CMEs, (4) a good correlation was found between the flare fluence versus the CME kinetic energy. Implications for flare-CME models are discussed.

Keywords

Sun: flaresSun: coronal mass ejections (CMEs)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S257: Universal Heliophysical Processes , September 2008 , pp. 233 - 243
Copyright
Copyright © International Astronomical Union 2009

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