UVCS Observations of the Solar Wind and its Modeling 6th Solar-B Science Meeting Kyoto, Japan, November 8–11, 2005 CMEs Coronal mass ejections (CMEs) are.

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UVCS Observations of the Solar Wind and its Modeling 6th Solar-B Science Meeting Kyoto, Japan, November 8–11, 2005 CMEs Coronal mass ejections (CMEs) are an efficient way for the Sun to shed twisted magnetic fields (and net helicity?) and generated solar energetic particles (SEPs). Coronagraph images contain much information, but spectroscopy also provides: Heating rates and energy budget (DEM) 3D velocity field & chirality; twisting/unwtisting rates conditions in shocks (preferential ion accel.) conditions in current sheets (reconnection rates)

UVCS Observations of the Solar Wind and its Modeling 6th Solar-B Science Meeting Kyoto, Japan, November 8–11, 2005 UVCS CME results: Reconnection physics On several occasions, narrow brightening in Fe XVIII (T e ~ 6 MK) appears in the probable location of a current sheet. Lin et al. (2005) also saw Lyman alpha “closing down” in the sheet: one can measure reconnection rate (V in / V out )

UVCS Observations of the Solar Wind and its Modeling 6th Solar-B Science Meeting Kyoto, Japan, November 8–11, 2005 UVCS CME results: Doppler shifts Feb. 12, 2000 Intensity Width Shift (Lyman alpha) April 18, 2000

UVCS Observations of the Solar Wind and its Modeling 6th Solar-B Science Meeting Kyoto, Japan, November 8–11, 2005 UVCS CME results: Shock physics Passage of a shock through the UVCS slit is identifiable (unambiguously!): “Hot” ion intensities increase & broad components appear “Cooler” lines rapidly Doppler dim Immediate change in T equilibration! Mancuso et al. (2002) Shock strengths derived by: are all consistent with one another! (1) Type II radio burst band-splitting (2) Ly-alpha adiabatic compression (3) Ion heating (Lee & Wu 2000)