22 citations · 100 across the 10 of their papers we have counts for
7 papers · 1 filter
The nature of tilted supercritical accretion discs
P. Chris Fragile, Matthew J. Middleton, Brooks Brasseur +2
In this paper, we report on the first 3D general relativistic radiation magnetohydrodynamic simulations of large supercritical accretion discs that are tilted with respect to the b…
Misalignment of the Lense-Thirring precession by an accretion torque
D. A. Bollimpalli, J. Horák, W. Kluźniak +1
Orbiting matter misaligned with a spinning black hole undergoes Lense-Thirring precession, due to the frame-dragging effect. This phenomenon is particularly relevant for type-C QPO…
Effect of geometrically thin discs on precessing, thick flows: Relevance to type-C QPOs
D. A. Bollimpalli, P. C. Fragile, W. Kluźniak
Type-C quasi-periodic oscillations (QPOs) are the low-frequency QPOs most commonly observed during the hard spectral state of X-ray binary systems. The leading model for these QPOs…
Magneto-rotational instability in magnetically polarized discs
Oscar M. Pimentel, P. Chris Fragile, F. D. Lora-Clavijo +2
The magneto-rotational instability (MRI) is the most likely mechanism for transportation of angular momentum and dissipation of energy within hot, ionized accretion discs. This ins…
Looking for the underlying cause of black hole X-ray variability in GRMHD simulations
D. A. Bollimpalli, R. Mahmoud, C. Done +4
Long-term observations have shown that black hole X-ray binaries exhibit strong, aperiodic variability on time-scales of a few milliseconds to seconds. The observed light curves di…
Atmospheric oscillations provide simultaneous measurement of neutron star mass and radius
D. A. Bollimpalli, M. Wielgus, D. Abarca +1
Neutron stars with near-Eddington observable luminosities were shown to harbor levitating atmospheres, suspended above their surface. We report a new method to simultaneously measu…