Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.2114w&link_type=abstract
American Astronomical Society, SPD meeting #40, #21.14; Bulletin of the American Astronomical Society, Vol. 41, p.857
Astronomy and Astrophysics
Astronomy
Scientific paper
In the continuing efforts to better understand the morphology of coronal mass ejections (CMEs), the STEREO mission provides two powerful new capabilities. The first is the use of two separate spacecraft to view CMEs from two very different vantage points. The second is the ability to track CMEs continuously from close to the Sun all the way to 1 AU, thanks to its Heliospheric Imagers (HI1 and HI2). In addition to its proficiency in tracking CMEs in the interplanetary medium (IPM), the HI2 camera for the first time offers the chance to actually view corotating interaction regions (CIRs) propagating through the IPM. We present one technique for reconstructing the 3D structure of both CMEs and CIRs from extensive STEREO observations, focusing on a CME from 2008 April 26, and a CIR from 2008 January. The CME analysis demonstrates how well a flux rope structure reproduces the appearance of this particular April 26 event, while the CIR reconstruction explores the issue of why CIR fronts in HI2-B images look so different from their HI2-A appearance.
Howard Ralph
Wood Brian
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