Interaction between comet Halley and the interplanetary magnetic field observed by Sakigake

Autor:	Takao Saito, Keiji Saito, Tomoko Nakagawa, Kunio Hirao, Kiyohumi Yumoto
Rok vydání:	1986
Předmět:	Physics Ionospheric dynamo region Solar wind Multidisciplinary Comet tail Halley's Comet Comet Astronomy Heliospheric current sheet Dipole model of the Earth's magnetic field Interplanetary magnetic field
Zdroj:	Nature. 321:303-307
ISSN:	1476-4687 0028-0836
DOI:	10.1038/321303a0
Popis:	During 10–12 March 1986, the magnetometer carried by the Japanese spacecraft Sakigake detected clear multiple crossings of the nearly horizontal heliospheric neutral sheet. As there was no apparent disconnection event (DE) in comet Halley's ion tail during 11–14 March, an interplanetary magnetic field (IMF)–comet interaction model with a quasi-parallel neutral sheet is proposed to explain why a DE did not occur. Enhancements of hydromagnetic (HM) waves were observed near the time of closest approach to comet Halley. Neutral particles of cometary origin are proposed to yield, at ∼7 × 106 km upstream of the comet, the ionized O+ (or H2O+) particles which excite the HM waves.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e20d42e8ebf9ee064b54b5ce96eea36 https://doi.org/10.1038/321303a0 Zobrazit plný text záznamu