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Our points

Our points. 1) Spectroscopic observations can be helpful in studies of CME plasma properties, LOS kinematics, development and recovery of dimmings.

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Our points

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  1. Our points • 1) Spectroscopic observations can be helpful in studies of CME plasma properties, LOS kinematics, development and recovery of dimmings. • 2) Simultaneous observations of intensity, Doppler shift, line width and linear polarization by CoMP can provide more constraint to models of CME initiation and propagation. Hui Tian, Scott W. McIntosh, Steven Tomczyk, Christian Bethge, et al.

  2. Spectroscopic observations of CMEs: LOS speed, plasma diagnostics • The background corona and CME ejecta can be separated through spectroscopic observations • Plasma properties (density, temperature) and real speed of CMEs (v=Sqrt(vpos2+vlos2)) can be derived Tian, McIntosh et al. 2012, ApJ, 748, 106

  3. Post-CME dynamics Dec 14-15 2006 CME May 19 2007 CME • High-speed (~100 km/s) upflows in CME-induced dimming regions may play an important role in refilling of the corona, mass supply to the solar wind, and additional acceleration of CMEs • Spectroscopic observations can provide a measurement of the density change and thus can be used to estimate mass of CMEs, especially halo-CMEs (mass loss in dimming)

  4. CoMP observations (I)

  5. CoMP observations (II) • Simultaneous observations of intensity, Doppler shift, line width and linear polarization will provide more constraint to models of CME initiation and propagation

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