Galactic Centre Threads as Nuclear MHD Waves
Astrophysics of Galaxies
2020-03-18 v1
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.
Cite
@article{arxiv.2001.11827,
title = {Galactic Centre Threads as Nuclear MHD Waves},
author = {Yoshiaki Sofue},
journal= {arXiv preprint arXiv:2001.11827},
year = {2020}
}
Comments
6 pages, 8 figures, PASJ Letters in press