In-situ and Numerical Modeling Prospects for Multipoint ICME Observations Featuring the 22 May 2007 STEREO Event

Details In-situ and Numerical Modeling Prospects for Multipoint ICME Observations Featuring the 22 May 2007 STEREO Event In-situ and Numerical Modeling Prospects for Multipoint ICME Observations Featuring the 22 May 2007 STEREO Event

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh51b..04l&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SH51B-04

Physics

2111 Ejecta, Driver Gases, And Magnetic Clouds, 2134 Interplanetary Magnetic Fields, 7513 Coronal Mass Ejections (2101), 7524 Magnetic Fields

Scientific paper

We will present recent 3D MHD simulation results of eruptive flux-rope formation via the magnetic breakout mechanism to provide a theoretical/modeling context for multipoint in-situ observations. Many generic observational CME properties are reproduced by this idealized eruption as it propagates through the low corona (~10 R\odot). Recently, STEREO observed a "classic" flux-rope ICME on 22 May 2007 with different in- situ field and plasma signatures seen at each spacecraft. The same event was also seen by WIND and ACE, arriving at L1 arriving a few hours before either STEREO A or B. We will describe a preliminary analysis of the large-scale heliospheric structure of the ICME flux-rope utilizing the linear, force-free cylinder model fits to the in- situ magnetic field rotations in order to determine the ICME's relative simplicity and/or consistency with the standard Magnetic Cloud cartoon picture. A comparison between the data, the derived in-situ cylinder orientations at three spacecraft, and the CME large-scale magnetic structure inferred from the MHD simulation results in the low corona show a reasonable qualitative agreement. BJL would like to acknowledge support from NSF ATM-0621725 as a SHINE Postdoc, and thank the STEREO, WIND and ACE teams for making their data readily available.

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