14 papers
Extreme-Mass-Ratio Inspirals in Gaseous Disks
Alexander J. Dittmann, Abhishek Hegade K. R., Callum W. Fairbairn
Gravitational waves from extreme mass ratio inspirals (EMRIs) are precise probes of the environment of the supermassive black holes (SMBHs) they orbit. If an SMBH is actively accre…
The Effects of Accretion Feedback on Stellar Evolution in AGN Disks
Alexander J. Dittmann, Matteo Cantiello
Stars embedded in the accretion disks of active galactic nuclei (AGN) can accrete rapidly from their surroundings, dramatically altering their structure and evolution. However, fee…
The Decoupling of Binaries from Their Circumbinary Disks
Alexander J. Dittmann, Geoffrey Ryan, M. Coleman Miller
We have investigated, both analytically and numerically, accreting supermassive black hole binaries as they inspiral due to gravitational radiation to elucidate the decoupling of b…
A More Rigorous Test Problem For Viscous Hydrodynamics Codes
Alexander J. Dittmann, Geoffrey Ryan
We advocate for a more stringent test problem for codes that aim to solve the equations of viscous hydrodynamics. Specifically, we discuss a nonuniform-density version of the commo…
Indirect forces in disc-planet interaction
Roman R. Rafikov, Nicolas P. Cimerman, Callum W. Fairbairn +1
Gravitational coupling between a protoplanetary disc and an embedded planet is often studied in a frame attached to a central star. This frame is non-inertial because of the stella…
Eccentric Binaries Accreting from Thin Disks: Orbital Evolution
Alexander J. Dittmann, Geoffrey Ryan, Luciano Combi
Circumbinary disks crucially affect the orbital and electromagnetic properties of binary systems across the universe, from stars in our galactic neighborhood to supermassive black…