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Relationships between flares and CMEs

SHINE 2009. Relationships between flares and CMEs. FRIDAY 9:00 am – 12:00 pm. Relationships between flares and CMEs. This session solicits both observational and theoretical studies addressing the relationships between solar flares and CMEs. The questions include

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Relationships between flares and CMEs

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  1. SHINE 2009 Relationships between flares and CMEs FRIDAY 9:00 am – 12:00 pm

  2. Relationships between flares and CMEs This session solicits both observational and theoretical studies addressing the relationships between solar flares and CMEs. The questions include • Is there a causal relationship between flares and CMEs? • The energy partition among various aspects of the flare-CME system • The interpretation and connection between directly and indirectly observed flare and CME products and properties • Are there fundamental differences between the process producing flare-CME pairs and that producing flare-less CMEs?

  3. Type III-L Solar Radio Bursts and their Associations with Solar Energetic Proton Events Robert T Duffin (George Mason Univ.), Stephen M. White (University of Maryland) Paul S. Ray (Naval Research Laboratory), Michael L. Kaiser (NASA/Goddard Space Flight Center) Type III-L bursts are a sub-class of type III solar radio bursts that tend to occur after the impulsive phase of flares; are longer in duration than individual type IIIs and tend to be low-frequency. There has been a proposal that type III-Ls are connected to solar energetic proton (SEP) events. Most work on this connection has started from samples of SEP events, but if type III-Ls are to be useful for prediction of SEP events, then we need to understand the properties of samples of type III-L bursts. This talk reports preliminary results from such a study. An operating definition based on previous work is used to identify type III-L events amongst M- and X-class flares from 2001; and then associations with other properties of these events are investigated, including association with SEP events. If there is an association with SEP events, one important factor that these bursts allow us to address is the question of whether acceleration takes place at an associated CME, or closer to the flare site well below the CME.

  4. Kinematics of CMEs observed in SECCHI HI: Fast solar wind interaction of CMEs? Robin Colaninno1 and Angelos Vourlidas2 George Mason University, Fairfax, VA 22030, 2Naval Research Laboratory, Washington, DC 20375 SHINE Meeting : August 2, 2009 Fit geometric Croissant model to STEREO SECCHI-COR2 to determine the 3D position of the CME. 02-Jun-2008 Point-n-click measurements of the CME, front, back and sides to determine the ratio of width and depth,Pancaking Factor and Rate. Insert CME measures into the Predictive Science's solar wind velocity model using the position derived from the Croissant model. Figure : a) and b) are longitudinal cuts at the longitude of the CME from the Croissant model. c) is a radial cut at the maximum height of the CME measured in HI1. d) is a latitudinal cut at the latitude of the CME from the Croissant model.

  5. Flux Rope CMEs Associated with Total and Partial Eruptive Prominences Hong Xie1,2, Holly Gilbert2, Nat Gopalswamy2, & Chris St Cyr2 1The Catholic University, and 2Goddard Space Flight Center First direct observations of the X-line structures (a well-known location of current sheets and reconnections) in EUVI 171 images, with associated PEPs in 304 and flux rope CME in COR1. Fig. 4 Correlation between mass and speed of the 17 flux rope CMEs with V< 700 kms-1. • The mean speed of TEP-CMEs is greater than that of PEP-CMEs but smaller than that of flare-CMEs. The X_line-CMEs have similar mean speeds as PEP-CMEs. • Good anti- correlation between mass and speed among the 17 flux rope CMEs with correlation coefficient r = -0.63. • No such correlation exists among the 7 flare-CMEs. • In agreement with the conclusion that the mass of slow CMEs consist of material mainly from the streamer belt in the corona (Kramar et al., 2009) Fig. 3 (a) and (b) A X-type magnetic structure (yellow arrow) and PEP associated with the 11-16-2007 CME in EUVI-A 171 and 304. (c) and (d) Superposition images of STEREO-A COR1 and EUVI 171 and 304. Fig, 2. An example of the flux rope model fit for the 26 April 2008 CME. (left): (a), (b), (c), and (d) STEREO A and B COR1 and EUVI 304 composition images; (right) (b), (d), (f) and (h) STEREO A and B COR1 and COR2 images superposed with flux-rope model outline curves (yellow curves).

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