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On the influence of CMEs on the global 3-D coronal electron density

التفاصيل البيبلوغرافية
العنوان: On the influence of CMEs on the global 3-D coronal electron density
المؤلفون: M. Kramar, J. Davila, H. Xie, S. Antiochos
المصدر: Annales Geophysicae, Vol 29, Pp 1019-1028 (2011)
بيانات النشر: Copernicus Publications, 2011.
سنة النشر: 2011
المجموعة: LCC:Science
LCC:Physics
LCC:Geophysics. Cosmic physics
مصطلحات موضوعية: Science, Physics, QC1-999, Geophysics. Cosmic physics, QC801-809
الوصف: In order to analize the influence of a Coronal Mass Ejection (CME) on the coronal streamer belt, we made 3-D reconstructions of the electron density in the corona at heliospheric distances from 1.5 to 4 R⊙ for periods before and after a CME occured. The reconstructions were performed using a tomography technique. We studied two CME cases: (i) a slow CME on 1 June 2008; (ii) two fast CMEs on 31 December 2007 and 2 January 2008. For the first case of slow CME, it was found: (i) the potential magnetic field configuration in the CME initiation region before the CME does not agree with the coronal density structure while after the CME the agreement between the field and density is much better. This could be manifistation of that that the field was non-potential before the CME and after the CME the field relaxes towards a more potential state. (ii) It was shown that the dimming caused by the slow CME is not due to rotation of the corona and a line-of-sight (LOS) effect but a streamer blow out effect took place.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 0992-7689
1432-0576
Relation: https://www.ann-geophys.net/29/1019/2011/angeo-29-1019-2011.pdf; https://doaj.org/toc/0992-7689; https://doaj.org/toc/1432-0576
DOI: 10.5194/angeo-29-1019-2011
URL الوصول: https://doaj.org/article/e12616b258ce4926b5c8cd6f33213bb3
رقم الأكسشن: edsdoj.12616b258ce4926b5c8cd6f33213bb3
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:09927689
14320576
DOI:10.5194/angeo-29-1019-2011