Observations of Coronal Mass Ejections with the Coronal Multichannel Polarimeter

Abstract

The Coronal Multichannel Polarimeter (CoMP) measures not only the polarization of coronal emission, but also the full radiance profiles of coronal emission lines. For the first time, CoMP observations provide high-cadence image sequences of the coronal line intensity, Doppler shift and line width simultaneously in a large field of view. By studying the Doppler shift and line width we may explore more of the physical processes of CME initiation and propagation. Here we identify a list of CMEs observed by CoMP and present the first results of these observations. Our preliminary analysis shows that CMEs are usually associated with greatly increased Doppler shift and enhanced line width. These new observations provide not only valuable information to constrain CME models and probe various processes during the initial propagation of CMEs in the low corona, but also offer a possible cost-effective and low-risk means of space weather monitoring.

6 figures. Will appear in the special issue of Coronal Magnetism, Sol. Phys

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Cited by in corpus (22)

• Global maps of the magnetic field in the solar corona
• A global view of velocity fluctuations in the corona below 1.3 $R_{\odot }$ with CoMP
• Mapping the magnetic field in the solar corona through magnetoseismology
• Measuring the magnetic field of a trans-equatorial loop system using coronal seismology
• Sun-as-a-star spectroscopic observations of the line-of-sight velocity of a solar eruption on October 28, 2021
• Observing the evolution of the Sun's global coronal magnetic field over eight months
• Coronal cavities: observations and implications for the magnetic environment of prominences
• A Solar Coronal Jet Event Triggers A Coronal Mass Ejection
• First High-resolution Spectroscopic Observations of an Erupting Prominence Within a Coronal Mass Ejection by the Interface Region Imaging Spectrograph (IRIS)
• Diagnosing the magnetic field structure of a coronal cavity observed during the 2017 total solar eclipse
• On the Nature of the Three-part Structure of Solar Coronal Mass Ejections
• Can we detect coronal mass ejections through asymmetries of Sun-as-a-star extreme-ultraviolet spectral line profiles?
• A statistical study of propagating MHD kink waves in the quiescent corona
• The high helium abundance and charge states of the interplanetary CME and its material source on the Sun
• Electron Densities in the Solar Corona Measured Simultaneously in the Extreme-Ultraviolet and Infra-Red
• Evolution of CME Properties in the Inner Heliosphere: Prediction for Solar Orbiter and Parker Solar Probe
• Enhanced Non-Thermal Line Broadening inside Coronal Cavities above Solar Prominences revealed by Spectral Imaging CoronaGraph
• Global Coronal Plasma Diagnostics Based on Multi-slit EUV Spectroscopy
• The SLED project and the dynamics of coronal flux ropes
• Forward Modeling of Dust-Induced Stray Light in Ground-Based Coronagraphs: A Dual-Path Monitoring Approach for High-Precision Inner Corona Observations
• Observational Technological Innovations and Future Development of the Lijiang Coronagraph
• Spectroscopic Signatures of Nonuniform Lateral Expansion of a Coronal Mass Ejection in the Low Corona with ADITYA-L1/VELC