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MHD instabilities in accretion mounds - I. 2D axisymmetric simulations

Mukherjee, Dipanjan; Bhattacharya, Dipankar; Mignone, Andrea


We have performed stability analysis of axisymmetric accretion mounds on neutron stars in high-mass X-ray binaries by 2D magnetohydrodynamic (MHD) simulations with the PLUTO MHD code. We find that the mounds are stable with respect to interchange instabilities, but the addition of excess mass destabilizes the equilibria. Our simulations confirm that accretion mounds are unstable with respect to MHD instabilities beyond a threshold mass. We investigate both filled and hollow mounds and for...[Show more]

CollectionsANU Research Publications
Date published: 2013
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stt020
Access Rights: Open Access


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