Dawn-Dusk Asymmetry of the Magnetopause Distance Under the Parker Spiral Configuration of the IMF

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10492104" target="_blank" >RIV/00216208:11320/24:10492104 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=n_UY347e5w" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=n_UY347e5w</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024JA033181" target="_blank" >10.1029/2024JA033181</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dawn-Dusk Asymmetry of the Magnetopause Distance Under the Parker Spiral Configuration of the IMF

Popis výsledku v původním jazyce

The dawn-dusk asymmetry of the magnetopause radial distance under the Parker (and ortho-Parker) configuration of the interplanetary magnetic field (IMF) is investigated. An extensive data set of about 50,000 magnetopause crossings identified in the data from the THEMIS A-E, Magion 4, Geotail, and Interball-1 satellites is used for this purpose. It is shown that the magnetopause radial distances are larger at the side where the IMF is quasi-parallel to the bow shock normal than at the side where IMF is quasi-perpendicular to the bow shock normal. The effect is more significant at the flanks than close to the subsolar point. This introduces a significant asymmetry of the magnetopause shape, with the difference in the magnetopause radial distances being as large as about one Earth radius beyond the terminator. The experimental results are confirmed by a global magnetohydrodynamic (MHD) model, demonstrating that the asymmetry can be explained by MHD effects, without considering foreshock transients. This MHD model is further used to investigate the evolution of individual pressure components across the magnetopause and contrast them in quasi-parallel and quasi-perpendicular cases.

Název v anglickém jazyce

Dawn-Dusk Asymmetry of the Magnetopause Distance Under the Parker Spiral Configuration of the IMF

Popis výsledku anglicky

The dawn-dusk asymmetry of the magnetopause radial distance under the Parker (and ortho-Parker) configuration of the interplanetary magnetic field (IMF) is investigated. An extensive data set of about 50,000 magnetopause crossings identified in the data from the THEMIS A-E, Magion 4, Geotail, and Interball-1 satellites is used for this purpose. It is shown that the magnetopause radial distances are larger at the side where the IMF is quasi-parallel to the bow shock normal than at the side where IMF is quasi-perpendicular to the bow shock normal. The effect is more significant at the flanks than close to the subsolar point. This introduces a significant asymmetry of the magnetopause shape, with the difference in the magnetopause radial distances being as large as about one Earth radius beyond the terminator. The experimental results are confirmed by a global magnetohydrodynamic (MHD) model, demonstrating that the asymmetry can be explained by MHD effects, without considering foreshock transients. This MHD model is further used to investigate the evolution of individual pressure components across the magnetopause and contrast them in quasi-parallel and quasi-perpendicular cases.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA21-26463S" target="_blank" >GA21-26463S: Procesy na magnetopauze, jejich příčiny a následky</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research. Space Physics

ISSN

2169-9380

e-ISSN

2169-9402

Svazek periodika

129

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

e2024JA033181

Kód UT WoS článku

001368954900001

EID výsledku v databázi Scopus

2-s2.0-85208964042