Magnetic Field Amplification in M82 Winds Caused by Kelvin‐Helmholtz Modes

Autor:	H. Wiechen, Antonius Otto, G. T. Birk
Rok vydání:	1999
Předmět:	Physics Field (physics) Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Galaxy merger Instability Magnetic field Galactic halo Space and Planetary Science Galaxy formation and evolution Halo Interacting galaxy Astrophysics::Galaxy Astrophysics
Zdroj:	The Astrophysical Journal. 518:177-182
ISSN:	1538-4357 0004-637X
DOI:	10.1086/307273
Popis:	Halos of active galaxies can show relatively strong magnetic fields. Observations indicate that such halo fields, which are significantly stronger than one would expect from the disk field strengths, seem to be associated with the dynamical flows and winds in the halo. Numerical simulations show that unstable Kelvin-Helmholtz modes, which are common in a sheared plasma flow configuration, can cause the observed magnetic field amplification in the halo of the prototype starburst galaxy M82. This result comes out to be widely independent from the specific choice of dynamical parameters as long as the Kelvin-Helmholtz instability onset criterion is fulfilled.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3267c64a22b873db6d13ea4fb410c774 https://doi.org/10.1086/307273 Zobrazit plný text záznamu