Excess of Sodium Ions Density Required to Create a Wide Current at the Hermean Magnetopause

Autor: Elena Belenkaya, Ivan Pensionerov, Igor Alexeev, David Parunakian
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Universe, Vol 7, Iss 10, p 355 (2021)
Druh dokumentu: article
ISSN: 2218-1997
DOI: 10.3390/universe7100355
Popis: In this paper we consider an unusual structure, twice observed at the magnetopause of Mercury, and called the “Double Magnetopause”. Presumably, it is associated with a current sheet created by Na+ ions. Two alternative scenarios are considered. The first one: Sodium ions prevail outside the Hermean magnetosphere. The second: Sodium ions predominate inside the magnetosphere of Mercury. These ions have been observed inside and outside the magnetosphere. We analyze what Na+ density excess can be sufficient for creation of a wide diamagnetic magnetopause current and on which side of the magnetopause this current is located. For each scenario, two directions of the north-south (Z) component of the solar wind magnetic field are considered.
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