TY - JOUR
T1 - Statistical study of linear magnetic hole structures near Earth
AU - Volwerk, Martin
AU - Mautner, David
AU - Simon Wedlund, Cyril
AU - Goetz, Charlotte
AU - Plaschke, Ferdinand
AU - Karlsson, Tomas
AU - Schmid, Daniel
AU - Rojas-Castillo, Diana
AU - Roberts, Owen W.
AU - Varsani, Ali
N1 - Publisher Copyright:
© 2021 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 2021/2/25
Y1 - 2021/2/25
N2 - The Magnetospheric Multiscale mission (MMS1) data for 8 months in the winter periods of 2017-2018 and 2018-2019, when MMS had its apogee in the upstream solar wind of the Earth's bow shock, are used to study linear magnetic holes (LMHs). These LMHs are characterized by a magnetic depression of more than 50 % and a rotation of the background magnetic field of less then 10g . A total of 406 LMHs are found and, based on their magnetoplasma characteristics, are split into three categories: cold (increase in density, little change in ion temperature), hot (increase in ion temperature, decrease in density) and sign change (at least one magnetic field component changes sign). The occurrence rate of LMHs is 2.3 per day. All LMHs are basically in pressure balance with the ambient plasma. Most of the linear magnetic holes are found in ambient plasmas that are stable against the mirror-mode generation, but only half of the holes are mirror-mode-stable inside.
AB - The Magnetospheric Multiscale mission (MMS1) data for 8 months in the winter periods of 2017-2018 and 2018-2019, when MMS had its apogee in the upstream solar wind of the Earth's bow shock, are used to study linear magnetic holes (LMHs). These LMHs are characterized by a magnetic depression of more than 50 % and a rotation of the background magnetic field of less then 10g . A total of 406 LMHs are found and, based on their magnetoplasma characteristics, are split into three categories: cold (increase in density, little change in ion temperature), hot (increase in ion temperature, decrease in density) and sign change (at least one magnetic field component changes sign). The occurrence rate of LMHs is 2.3 per day. All LMHs are basically in pressure balance with the ambient plasma. Most of the linear magnetic holes are found in ambient plasmas that are stable against the mirror-mode generation, but only half of the holes are mirror-mode-stable inside.
UR - http://www.scopus.com/inward/record.url?scp=85101625154&partnerID=8YFLogxK
U2 - 10.5194/angeo-39-239-2021
DO - 10.5194/angeo-39-239-2021
M3 - Article
AN - SCOPUS:85101625154
SN - 0992-7689
VL - 39
SP - 239
EP - 253
JO - Annales Geophysicae
JF - Annales Geophysicae
IS - 1
M1 - 239
ER -