scholarly journals Evolution of a Long‐Duration Coronal Mass Ejection and Its Sheath Region Between Mercury and Earth on 9–14 July 2013

2020 ◽  
Vol 125 (1) ◽  
Author(s):  
N. Lugaz ◽  
R. M. Winslow ◽  
C. J. Farrugia
Keyword(s):  
Coronal Mass Ejection ◽  
Sheath Region ◽  
Long Duration ◽  
Mass Ejection

Coexistence of a planar magnetic structure and an Alfvén wave in the shock-sheath of an interplanetary coronal mass ejection

2019 ◽  
Vol 490 (2) ◽  
pp. 1638-1643 ◽  
Author(s):  
Zubair I Shaikh ◽  
Anil Raghav ◽  
Geeta Vichare
Keyword(s):  
Coronal Mass Ejection ◽  
Magnetic Structure ◽  
Interplanetary Space ◽  
Minimum Variance ◽  
Alfven Wave ◽  
Sheath Region ◽  
Interplanetary Coronal Mass Ejection ◽  
Analysis Technique ◽  
Mass Ejection ◽  
First Time

ABSTRACT The excess speed of coronal mass ejection over the ambient solar wind in interplanetary space generates a highly compressed, heated and turbulent shock-sheath. Here, for the first time, we present in situ observations of a unique and distinct feature of the shock-sheath, which exhibits the characteristics of a planar magnetic structure (PMS) and an Alfvén wave simultaneously. We have used standard techniques to confirm the presence of the PMS as described in Shaikh et al. We have employed the minimum variance analysis technique to estimate the properties of the PMS. The Walén test is used to confirm the presence of the Alfvén wave. Our study unambiguously proves the coexistence of the Alfvén wave and the PMS in the shock-sheath region. Further studies are essential to investigate the origin of such a peculiar shock-sheath and its effect on our view of solar-terrestrial physics.

scholarly journals An unusual giant spiral arc in the polar cap region during the northward phase of a Coronal Mass Ejection

2007 ◽  
Vol 25 (2) ◽  
pp. 507-517 ◽  
Author(s):  
L. Rosenqvist ◽  
A. Kullen ◽  
S. Buchert
Keyword(s):  
Solar Wind ◽  
Coronal Mass Ejection ◽  
Spiral Structure ◽  
Wind Pressure ◽  
Polar Cap ◽  
Sheath Region ◽  
Interplanetary Coronal Mass Ejection ◽  
Solar Wind Pressure ◽  
Pressure Changes ◽  
Mass Ejection

Abstract. The shock arrival of an Interplanetary Coronal Mass Ejection (ICME) at ~09:50 UT on 22 November 1997 resulted in the development of an intense (Dst<−100 nT) geomagnetic storm at Earth. In the early, quiet phase of the storm, in the sheath region of the ICME, an unusual large spiral structure (diameter of ~1000 km) was observed at very high latitudes by the Polar UVI instrument. The evolution of this structure started as a polewardly displaced auroral bulge which further developed into the spiral structure spreading across a large part of the polar cap. This study attempts to examine the cause of the chain of events that resulted in the giant auroral spiral. During this period the interplanetary magnetic field (IMF) was dominantly northward (Bz>25 nT) with a strong duskward component (By>15 nT) resulting in a highly twisted tail plasma sheet. Geotail was located at the equatorial dawnside magnetotail flank and observed accelerated plasma flows exceeding the solar wind bulk velocity by almost 60%. These flows are observed on the magnetosheath side of the magnetopause and the acceleration mechanism is proposed to be typical for strongly northward IMF. Identified candidates to the cause of the spiral structure include a By induced twisted magnetotail configuration, the development of magnetopause surface waves due to the enhanced pressure related to the accelerated magnetosheath flows aswell as the formation of additional magnetopause deformations due to external solar wind pressure changes. The uniqeness of the event indicate that most probably a combination of the above effects resulted in a very extreme tail topology. However, the data coverage is insufficient to fully investigate the physical mechanism behind the observations.

High-resolution X-ray spectra of solar flares. VII - A long-duration X-ray flare associated with a coronal mass ejection

1985 ◽  
Vol 292 ◽  
pp. 309 ◽  
Author(s):  
R. W. Kreplin ◽  
G. A. Doschek ◽  
U. Feldman ◽  
N. R., Jr. Sheeley ◽  
J. F. Seely
Keyword(s):  
High Resolution ◽  
Coronal Mass Ejection ◽  
Solar Flares ◽  
X Ray ◽  
Long Duration ◽  
Mass Ejection

EVIDENCE FOR INTERNAL TETHER-CUTTING IN A FLARE/CORONAL MASS EJECTION OBSERVED BYMESSENGER,RHESSI, ANDSTEREO

2010 ◽  
Vol 721 (2) ◽  
pp. 1579-1584 ◽  
Author(s):  
Claire L. Raftery ◽  
Peter T. Gallagher ◽  
R. T. James McAteer ◽  
Chia-Hsien Lin ◽  
Gareth Delahunt
Keyword(s):  
Coronal Mass Ejection ◽  
Mass Ejection

Flux Rope Model of the 2003 October 28–30 Coronal Mass Ejection and Interplanetary Coronal Mass Ejection

2006 ◽  
Vol 642 (1) ◽  
pp. 541-553 ◽  
Author(s):  
J. Krall ◽  
V. B. Yurchyshyn ◽  
S. Slinker ◽  
R. M. Skoug ◽  
J. Chen
Keyword(s):  
Coronal Mass Ejection ◽  
Flux Rope ◽  
Interplanetary Coronal Mass Ejection ◽  
Mass Ejection

scholarly journals Three-dimensional MHD modeling of the solar wind structures associated with 13 December 2006 coronal mass ejection

2009 ◽  
Vol 114 (A10) ◽  
pp. n/a-n/a ◽  
Author(s):  
R. Kataoka ◽  
T. Ebisuzaki ◽  
K. Kusano ◽  
D. Shiota ◽  
S. Inoue ◽  
...  
Keyword(s):  
Solar Wind ◽  
Coronal Mass Ejection ◽  
Three Dimensional ◽  
Mhd Modeling ◽  
Mass Ejection

VLA Measurements of Faraday Rotation Through a Coronal Mass Ejection Using Multiple Lines of Sight

Solar Physics ◽  
2021 ◽  
Vol 296 (1) ◽  
Author(s):  
Jason E. Kooi ◽  
Madison L. Ascione ◽  
Lianis V. Reyes-Rosa ◽  
Sophia K. Rier ◽  
Mohammad Ashas
Keyword(s):  
Coronal Mass Ejection ◽  
Faraday Rotation ◽  
Mass Ejection
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