3 papers
astro-ph.SR2025
Disc breaking and parametric instability in warped accretion discs
Loren E Held, Gordon I. Ogilvie
We present the first local simulations of disc breaking/tearing in a warped accretion disc. Warps can arise due to a misalignment between the disc and the rotation axis of the cent…
astro-ph.HE2025
MRI-driven dynamo at high Pm numbers
Alexis Reboul-Salze, Loren E. Held, Kenta Kiuchi
To power gamma-ray bursts and other high-energy events, large-scale magnetic fields are required to extract rotational energy from compact objects such as black holes and neutron s…
astro-ph.SR2024
Instability and warping in vertically oscillating accretion discs
Loren E. Held, Gordon I. Ogilvie
Many accretion discs have been found to be distorted: either warped due a misalignment in the system, or non-circular as a result of orbital eccentricity or tidal deformation by a…