Space weather effects on the bow shock, the magnetic barrier, and the ion composition boundary at Venus

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Space weather effects on the bow shock, the magnetic barrier, and the ion composition boundary at Venus. / Vech, Daniel; Szego, K.; Opitz, A.; Kajdic, P.; Fraenz, M.; Kallio, Esa; Alho, Markku.

julkaisussa: Journal of geophysical research: Space physics, Vuosikerta 120, Nro 6, 2015, s. 4613-4627.

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Vech, Daniel ; Szego, K. ; Opitz, A. ; Kajdic, P. ; Fraenz, M. ; Kallio, Esa ; Alho, Markku. / Space weather effects on the bow shock, the magnetic barrier, and the ion composition boundary at Venus. Julkaisussa: Journal of geophysical research: Space physics. 2015 ; Vuosikerta 120, Nro 6. Sivut 4613-4627.

Bibtex - Lataa

@article{a1b817800c474454b245c9750dfe2b75,
title = "Space weather effects on the bow shock, the magnetic barrier, and the ion composition boundary at Venus",
abstract = "We present a statistical study on the interaction between interplanetary coronal mass ejections (ICMEs) and the induced magnetosphere of Venus when the peak magnetic field of the magnetic barrier was anomalously large (>65nT). Based on the entire available Venus Express data set from April 2006 to October 2014, we selected 42 events and analyzed the solar wind parameters, the position of the bow shock, the size and plasma properties of the magnetic barrier, and the position of the ion composition boundary (ICB). It was found that the investigated ICMEs can be characterized with interplanetary shocks and unusually large tangential magnetic fields with respect to the Venus-Sun line. In most of the cases the position of the bow shock was not affected by the ICME. In a few cases the interaction between magnetic clouds and the induced magnetosphere of Venus was observed. During these events the small magnetosonic Mach numbers inside magnetic clouds caused the bow shock to appear at anomalously large distances from the planet. The positions of the upper and lower boundaries of the magnetic barrier were not affected by the ICMEs. The position of the ICB on the nightside was found closer to the planet during ICME passages which is attributed to the increased solar wind dynamic pressure. Key Points Statistical study of the ICME-Venus interaction Analysis of solar wind and magnetic barrier conditions during ICME passages Decreased altitude of the nightside ionosphere during ICME passages {\circledC}2015. American Geophysical Union. All Rights Reserved.",
keywords = "Coronal mass ejections, Shock waves, Solar effects, Venus, Coronal mass ejections, Shock waves, Solar effects, Venus, Coronal mass ejections, Shock waves, Solar effects, Venus",
author = "Daniel Vech and K. Szego and A. Opitz and P. Kajdic and M. Fraenz and Esa Kallio and Markku Alho",
year = "2015",
doi = "10.1002/2014JA020782",
language = "English",
volume = "120",
pages = "4613--4627",
journal = "Journal of geophysical research: Space physics",
issn = "2169-9380",
number = "6",

}

RIS - Lataa

TY - JOUR

T1 - Space weather effects on the bow shock, the magnetic barrier, and the ion composition boundary at Venus

AU - Vech, Daniel

AU - Szego, K.

AU - Opitz, A.

AU - Kajdic, P.

AU - Fraenz, M.

AU - Kallio, Esa

AU - Alho, Markku

PY - 2015

Y1 - 2015

N2 - We present a statistical study on the interaction between interplanetary coronal mass ejections (ICMEs) and the induced magnetosphere of Venus when the peak magnetic field of the magnetic barrier was anomalously large (>65nT). Based on the entire available Venus Express data set from April 2006 to October 2014, we selected 42 events and analyzed the solar wind parameters, the position of the bow shock, the size and plasma properties of the magnetic barrier, and the position of the ion composition boundary (ICB). It was found that the investigated ICMEs can be characterized with interplanetary shocks and unusually large tangential magnetic fields with respect to the Venus-Sun line. In most of the cases the position of the bow shock was not affected by the ICME. In a few cases the interaction between magnetic clouds and the induced magnetosphere of Venus was observed. During these events the small magnetosonic Mach numbers inside magnetic clouds caused the bow shock to appear at anomalously large distances from the planet. The positions of the upper and lower boundaries of the magnetic barrier were not affected by the ICMEs. The position of the ICB on the nightside was found closer to the planet during ICME passages which is attributed to the increased solar wind dynamic pressure. Key Points Statistical study of the ICME-Venus interaction Analysis of solar wind and magnetic barrier conditions during ICME passages Decreased altitude of the nightside ionosphere during ICME passages ©2015. American Geophysical Union. All Rights Reserved.

AB - We present a statistical study on the interaction between interplanetary coronal mass ejections (ICMEs) and the induced magnetosphere of Venus when the peak magnetic field of the magnetic barrier was anomalously large (>65nT). Based on the entire available Venus Express data set from April 2006 to October 2014, we selected 42 events and analyzed the solar wind parameters, the position of the bow shock, the size and plasma properties of the magnetic barrier, and the position of the ion composition boundary (ICB). It was found that the investigated ICMEs can be characterized with interplanetary shocks and unusually large tangential magnetic fields with respect to the Venus-Sun line. In most of the cases the position of the bow shock was not affected by the ICME. In a few cases the interaction between magnetic clouds and the induced magnetosphere of Venus was observed. During these events the small magnetosonic Mach numbers inside magnetic clouds caused the bow shock to appear at anomalously large distances from the planet. The positions of the upper and lower boundaries of the magnetic barrier were not affected by the ICMEs. The position of the ICB on the nightside was found closer to the planet during ICME passages which is attributed to the increased solar wind dynamic pressure. Key Points Statistical study of the ICME-Venus interaction Analysis of solar wind and magnetic barrier conditions during ICME passages Decreased altitude of the nightside ionosphere during ICME passages ©2015. American Geophysical Union. All Rights Reserved.

KW - Coronal mass ejections

KW - Shock waves

KW - Solar effects

KW - Venus

KW - Coronal mass ejections

KW - Shock waves

KW - Solar effects

KW - Venus

KW - Coronal mass ejections

KW - Shock waves

KW - Solar effects

KW - Venus

U2 - 10.1002/2014JA020782

DO - 10.1002/2014JA020782

M3 - Article

VL - 120

SP - 4613

EP - 4627

JO - Journal of geophysical research: Space physics

JF - Journal of geophysical research: Space physics

SN - 2169-9380

IS - 6

ER -

ID: 1977463