Analytical model for the transit time of an interplanetary magnetic cloud

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00605559" target="_blank" >RIV/67985815:_____/25:00605559 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jastp.2024.106416" target="_blank" >https://doi.org/10.1016/j.jastp.2024.106416</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jastp.2024.106416" target="_blank" >10.1016/j.jastp.2024.106416</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analytical model for the transit time of an interplanetary magnetic cloud

Popis výsledku v původním jazyce

This paper presents an analytical model for the propagation of a toroidal interplanetary magnetic cloud from the vicinity of the Sun to Earth's orbit. This model is applied to the May 12-15, 1997 event for calculations of cloud's acceleration and velocity using a three forces approximation in driving the magnetic cloud's dynamics: the diamagnetic push away from the stronger magnetic field region near the Sun, a drag force due to the ambient solar wind, and the Sun's gravity pull. From the minimization of the difference between the calculated versus observed transit time of the magnetic cloud, we determine free parameters of our model and identify the solar source on May 12 at 5:03 UT. In situ measurements near Earth's orbit done before May 12 set the values of the ambient interplanetary magnetic field, as well as of the ambient solar wind through which the magnetic cloud traveled. The observed temperature and density inside the magnetic cloud at Earth's orbit determine the corresponding inner values during the magnetic cloud's propagation. The coefficient of the drag force is one of free parameters in the model.

Název v anglickém jazyce

Analytical model for the transit time of an interplanetary magnetic cloud

Popis výsledku anglicky

This paper presents an analytical model for the propagation of a toroidal interplanetary magnetic cloud from the vicinity of the Sun to Earth's orbit. This model is applied to the May 12-15, 1997 event for calculations of cloud's acceleration and velocity using a three forces approximation in driving the magnetic cloud's dynamics: the diamagnetic push away from the stronger magnetic field region near the Sun, a drag force due to the ambient solar wind, and the Sun's gravity pull. From the minimization of the difference between the calculated versus observed transit time of the magnetic cloud, we determine free parameters of our model and identify the solar source on May 12 at 5:03 UT. In situ measurements near Earth's orbit done before May 12 set the values of the ambient interplanetary magnetic field, as well as of the ambient solar wind through which the magnetic cloud traveled. The observed temperature and density inside the magnetic cloud at Earth's orbit determine the corresponding inner values during the magnetic cloud's propagation. The coefficient of the drag force is one of free parameters in the model.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Atmospheric and Solar-Terrestrial Physics

ISSN

1364-6826

e-ISSN

1879-1824

Svazek periodika

267

Číslo periodika v rámci svazku

Feb.

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

106416

Kód UT WoS článku

001398889600001

EID výsledku v databázi Scopus

2-s2.0-85214463036