Discussion Points for CME Group A. Vourlidas NRL.

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Presentation transcript:

Discussion Points for CME Group A. Vourlidas NRL

CME Initiation in 195A

CME Initiation in 171A EUVI-A /171EUVI-B /171

Loops Collapse (t=0)

First upward motion (+56min)

Fluxrope Formation? (+140min)

Eruption (+187min) Core

EUV Evacuation (+ 222 – 255 min)

Nugget 3: Eruption in the Low Corona A-B separation = 28 deg Cadence = 10 min Mild wavelet enhancement

Nugget 3: Eruption in the Low Corona A-B separation = 28 deg Cadence = 10 min Mild wavelet enhancement

The “Standard” Flare-CME Concept Where is the a direct physical connection between CME and Flare? Forbes 2000 Lin & Forbes 2002     

Outstanding Issues Why are there two types of flares (eruptive/implusive)? –What decides the flare type? -Available magnetic energy (We need to measure Free Magnetic Energy) -Access to open field lines Do the flare-accelerated particles have access to the CME? –How do they escape? –How many are there? What is the connection between the CME acceleration – Flare light curve? When does the CME fluxrope form? Is there a single initiation mechanism?

Wish List for Cycle 24 Focused observations of the physical connections between CME and Flare –Behind the CME/above the flare –HXR and radio imaging –Wish: Eclipse-like visible imaging of the corona (0.03 – 3 Rs) Reliable estimation of the field non-potentiality –Improved extrapolation codes –Wish: Magnetic field observations above canopy into TR FME Initiation: –High cadence EUV observations (< 1min), during the early phase (<10 min), at low heights (<1.5 Rs). Improved energy measurements. –Better flare energy estimates. –CME composition measurements in early phase (e.g., Lee et al 09).

Questions for Working Groups Q1: Does the erupting fluxrope preexist? Is this a valid question? Q2: What can we learn from the CME acceleration profile? Q3: What is the role of B bkg in flares/CMEs? Q4: Are there event that do not conform to the flares/plasma ejection paradigm? Q5: What is the role of non-magnetic forces in the eruption? Q6: Do we understand 3D reconnection? Topologies, energy release/partition? Q7: How can we reliably measure the ‘free’ magnetic energy? What about helicity? Q8: Role of multipolar systems in flares/CMEs? Q9: How reliable are the GOES SXR curves? Q10: What is the role of Flare/CMEs in the dynamo-drive evolution of the corona?