Three-Dimensional Properties of Coronal Mass Ejections from STEREO-SECCHI ObservationsReport as inadecuate




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Solar Physics

, Volume 281, Issue 1, pp 167–185

First Online: 16 October 2012Received: 15 November 2011Accepted: 04 September 2012

Abstract

We identify 565 coronal mass ejections CMEs between January 2007 and December 2010 in observations from the twin STEREO-SECCHI-COR2 coronagraphs aboard the STEREO mission. Our list is in full agreement with the corresponding SOHO-LASCO CME Catalog http:-cdaw.gsfc.nasa.gov-CME list- for events with angular widths of 45 and up. The monthly event rates behave similarly to sunspot rates showing a three- to fourfold rise between September 2009 and March 2010. We select 51 events with well-defined white-light structure and model them as three-dimensional 3D flux ropes using a forward-modeling technique developed by Thernisien, Howard and Vourlidas Astrophys. J. 652 , 763 – 773, 2006. We derive their 3D properties and identify their source regions. We find that the majority of the CME flux ropes 82 % lie within 30 of the solar equator. Also, 82 % of the events are displaced from their source region, to a lower latitude, by 25 or less. These findings provide strong support for the deflection of CMEs towards the solar equator reported in earlier observations, e.g. by Cremades and Bothmer Astron. Astrophys.422 , 307 – 322, 2004.

KeywordsCoronal mass ejection The Sun 360

Guest Editors: Bernhard Fleck, Bernd Heber, and Angelos Vourlidas

Electronic Supplementary MaterialThe online version of this article doi:10.1007-s11207-012-0123-5 contains supplementary material, which is available to authorized users.

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Author: E. Bosman - V. Bothmer - G. Nisticò - A. Vourlidas - R. A. Howard - J. A. Davies

Source: https://link.springer.com/



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