Dependence of CME Propagation on Parameters of the Ejecta and Ambient Solar Wind

Details Dependence of CME Propagation on Parameters of the Ejecta and Ambient Solar Wind Dependence of CME Propagation on Parameters of the Ejecta and Ambient Solar Wind

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh41a1632l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH41A-1632

Astronomy and Astrophysics

Astrophysics

[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections

Scientific paper

CME propagation through the heliosphere has been one of the most uncertain problems, due to its complex nature and sparse observations in the vast space. CME travel time, speed and trajectory have been often unpredictable, because they may be modified going through ambient solar wind streams and IMF structure. All of these parameters are important for understanding CMEs and their space weather consequences. Direct observations of CME propagation through to 1AU have only become a reality since the recent STEREO Heliospheric Imager (HI) observations. Based on a few strategically selected CMEs that vary in parameter space and situated in different solar wind/IMF conditions, we perform several CCMC ENLIL with cone model simulations to study the propagation. Comparisons between modeling results including CME driven shock properties, travel time, 3D trajectory, and distortion of the ejecta (limited to the model approximation) will be made. Comparisons are also made between modeling, HI imaging results, and observed in-situ parameters when available.

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