10 papers
Outflows in steep density gradients: diversity of behavior and implications for tidal disruption events and luminous fast blue optical transients
Benjamin Amend, Michael Camilo, Eric R. Coughlin +2
Powerful explosions may undergo sustained energy injection as a central engine launches a wind into the surrounding gas, generating a forward and a reverse shock separated by a con…
Massive Perturbers and Transient Pickup Discs in Disc-Crossing Encounters in OJ 287-like Supermassive Black Hole Binaries
Debojyoti Garain, Jonathan Zrake, Zoltan Haiman
We study the hydrodynamical response of a massive black hole accretion disc punctured by a lower mass black hole on an inclined, eccentric orbit, as motivated by the quasi-periodic…
The interaction phase of engine-driven explosions and high-energy winds
Benjamin Amend, Christopher Lagomarsino, Eric R. Coughlin +1
Wide-angle outflows, or winds, are associated with a broad range of astrophysical systems, including protostars, massive stars, X-ray binaries, tidal disruption events (TDEs), lumi…
Stochastic Variability of Binary Accretion
Akhil Nair, Jonathan Zrake
We measure the power spectral density (PSD) of the accretion rate time series in an unequal mass (q = 0.2) binary surrounded by a circumbinary gas disk, using very high-resolution…
Systematic Error in Approximate Models of the GRB Early Afterglow
Benjamin Amend, Eric R. Coughlin, Jonathan Zrake
Gamma-ray burst (GRB) afterglows are thought to arise when relativistic ejecta launched by a compact central engine drive a blast wave into the surrounding circumburst medium, prod…
Eccentric Disks from Gaseous Rings around Equal-Mass, Circular Binaries
Leonardo Betancourt, Andrew MacFadyen, Jonathan Zrake
We perform high-resolution, grid-based hydrodynamics simulations of gaseous rings viscously spreading into disks around equal-mass, circular binaries. We find that all systems supp…