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]
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