The Critical Velocity Effect as a Cause for the Hα Emission from the Magellanic Stream

Autor:	C. Konz, Harald Lesch, G. T. Birk, H. Wiechen
Rok vydání:	2001
Předmět:	Physics Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Plasma Critical ionization velocity Galactic halo Space and Planetary Science Ionization Magellanic Stream Yield (chemistry) H-alpha Physics::Atomic Physics Astrophysics::Galaxy Astrophysics
Zdroj:	The Astrophysical Journal. 548:249-252
ISSN:	1538-4357 0004-637X
DOI:	10.1086/318690
Popis:	Observations show significant H\alpha-emissions in the Galactic halo near the edges of cold gas clouds of the Magellanic Stream. The source for the ionization of the cold gas is still a widely open question. In our paper we discuss the critical velocity effect as a possible explanation for the observed H\alpha-emission. The critical velocity effect can yield a fast ionization of cold gas if this neutral gas passes through a magnetized plasma under suitable conditions. We show that for parameters that are typical for the Magellanic Stream the critical velocity effect has to be considered as a possible ionization source of high relevance. Comment: 9 pages, 2 figures. accepted, to appear in The Astrophysical Journal
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::072a380474d7e519251ab16e778a0a20 https://doi.org/10.1086/318690 Zobrazit plný text záznamu