Relationships Between Flares and CME’s Monday, 23 June 2008 Monday, 23 June, 1:30pm, Grindelwald, we have 3 Invited speakers, plenty of extra time for discussion. H.S. Hudson: Relationships Between Flares and CMEs: “The relationships between flares and CMEs have been fraught with uncertainties in the recent past, but are now becoming observationally clearer. “ K. K. Reeves: Theoretical Predictions of Energy Release in CMEs and Calculations of Flare Emissions: ”Using an analytical loss-of-equilibrium model, we have calculated the energy release accompanying coronal mass ejections.” S. Krucker: Hard X-ray Emissions from the High Corona Associated with CMEs: “For flares occurring 20 or more degrees behind the solar limb, the main thermal and non-thermal hard X-ray (HXR) flare emissions are occulted, and faint HXR emissions from the high corona (>200 arcsec above flare site) can be investigated ….”

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson Seems to be a reasonable correlation between flare energy and CME energy! But there are big CME events that have almost no “flare” component So maybe the energy relationship is not all that straight-forward… ?

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson NLFFF excess Potential Not clear that NLFFF energy is enough for observed particle/xray/flare + CME energies… The changes are stepwise, of order 10% of the line-of- sight field, and primarily occur at the impulsive phase of the flare Changes in LOS magnetogram field(s) may be related to change in tilt of field before/after flares All the energy for flares/CMEs very low in the solar atmosphere Hugh’s talk requires a lot of “mental differentiation” NLFFF excess 50% contour

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson There was this idea “loops shrink before a flare” but, the TRACE movie evidence showed this was a “certain model’s” breakout reconnection flux-transfer to side-arcades prior to flare and that, in fact, all the loops above filament eruption go up… Fletcher & Hudson 2008 The Fletcher & Hudson 2008 paper has “sluggish citation rate” Not twist modes concentrating in flare-loop footpoints but non-linear Alfven waves resulting naturally from reconnection region

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson A. Vourlidas showed STEREO movie showing Poynting flux into CS

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson r0 = inner boundary (flare)r1 = outer boundary (CME) Forbes+Lin analytic model is “elegant and complicated” (not “simple”) Energy down is conductive flux Energy up is initially poynting flux (shear component) then kinetic energy Impulsive phase, up:down energy partition

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson Basic flare picture more-or-less still okay… But, huge problem with the observational/theoretical issue of: Acceleration Particles Photons “Tell me how many e- you need me to accelerate and I’ll tell you that you need 10X more…” –S. Krucker If this is true for HXR footpoint sources…

Now there are a handful of occulted flare events with HXR loop-top sources all images taken at the same time SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson pre-event SXR image

SUMMARY: Relationships between Flares and CMEs “Follow the energy to understand the physics” – H. Hudson What is to be done? (Today) SHINE Invited Talk 2: “Hard X-rays, Flares, and Particle Acceleration” – Markus Aschwanden (Wed) WG2: Hard Xrays & Particle Accel, 10:30am (Thurs) WG1: CME Dynamics, what are EUV-waves? 1:30pm _______ Energy Partition! How much goes where?! How much did we start with? Modelers should do the Reeves et al. analysis for their 3D current-sheets There ought to be a soln to this e- problem… Keep up the good work!