Magnetic flux expulsion in powerful superbubble explosions and the - dynamo

Autor:	R.M. Kulsrud, R.R. Rafikov
Rok vydání:	2000
Předmět:	Physics Gravity (chemistry) Astrophysics::High Energy Astrophysical Phenomena Shell (structure) Flux Astronomy and Astrophysics Cosmic ray Superbubble Astrophysics Magnetic flux Galaxy Space and Planetary Science Astrophysics::Galaxy Astrophysics Dynamo
Zdroj:	Monthly Notices of the Royal Astronomical Society. 314:839-848
ISSN:	1365-2966 0035-8711
DOI:	10.1046/j.1365-8711.2000.03408.x
Popis:	The possibility of the magnetic flux expulsion from the Galaxy in the superbubble (SB) explosions, important for the Alpha-Omega dynamo, is considered. Special emphasis is put on the investigation of the downsliding of the matter from the top of the shell formed by the SB explosion which is able to influence the kinematics of the shell. It is shown that either Galactic gravity or the development of the Rayleigh-Taylor instabilities in the shell limit the SB expansion, thus, making impossible magnetic flux expulsion. The effect of the cosmic rays in the shell on the sliding is considered and it is shown that it is negligible compared to Galactic gravity. Thus, the question of possible mechanism of flux expulsion in the Alpha-Omega dynamo remains open.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c2cdc1e8fd156550118f3dffc16b3fff https://doi.org/10.1046/j.1365-8711.2000.03408.x Zobrazit plný text záznamu Plný text