Galactic Centre Threads as Nuclear MHD Waves

Yoshiaki SOFUE

Galactic Centre Threads as Nuclear MHD Waves

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arxiv 2001.11827 v1 pith:BTVQWI65 submitted 2020-01-31 astro-ph.GA

Yoshiaki Sofue This is my paper · ORCID

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keywords wavesthreadsgalacticmagneticnucleusactivityalongcase

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abstract

Propagation of fast-mode magnetohydrodynamic (MHD) compression waves is traced in the Galactic Center with a poloidal magnetic cylinder. MHD waves ejected from the nucleus are reflected and guided along the magnetic field, exhibiting vertically stretched fronts. The radio threads and non-thermal filaments are explained as due to tangential views of the waves driven by sporadic activity in Sgr A$^*$, or by multiple supernovae. In the latter case, the threads could be extremely deformed relics of old SNRs exploded in the nucleus.

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Radio filaments as Z-pinched Galactic center wind
astro-ph.GA 2024-12 reject novelty 6.0 of 10

The paper proposes that Galactic center radio filaments are Z-pinched currents produced by charge-dependent magnetic deflection of the Galactic center wind.

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