320 citations · 751 across the 14 of their papers we have counts for
14 papers
Simulations of Interacting Binary Systems -- Pathways to Radio Bright GRB Progenitors
Angel Hernandez, Roseanne M. Cheng, Nicole M. Lloyd-Ronning +1
Although the association of gamma-ray bursts with massive stellar death is on firm footing, the nature of the progenitor system and the key ingredients required for a massive star…
Understanding Binary Systems -- a Comparison between COSMIC and MESA
Lailani Kenoly, A. Ken Luu, Celia Toral +4
We compare the evolution of binary systems evolved in the MESA stellar evolution code to those in the COSMIC population synthesis code. Our aim is to convey the robustness of the e…
On the Anti-Correlation between Duration and Redshift in Gamma-ray Bursts
Nicole M. Lloyd-Ronning, Jarrett L. Johnson, Roseanne M. Cheng +4
For gamma-ray bursts (GRBs) with durations greater than two seconds (so-called long GRBs), the intrinsic prompt gamma-ray emission appears, on average, to last longer for bursts at…
The Physics of Accretion Discs, Winds And Jets in Tidal Disruption Events
Jane Lixin Dai, Giuseppe Lodato, Roseanne M. Cheng
Accretion onto black holes is an efficient mechanism in converting the gas mass-energy into energetic outputs as radiation, wind and jet. Tidal disruption events, in which stars ar…
Simulations of Tidal Disruption Events
Giuseppe Lodato, Roseanne M. Cheng, Clement Bonnerot +1
Numerical simulations have historically played a major role in understanding the hydrodynamics of the tidal disruption process. Given the complexity of the geometry of the system,…
PatchworkWave: A Multipatch Infrastructure for Multiphysics/Multiscale/Multiframe/Multimethod Simulations at Arbitrary Order
Dennis B. Bowen, Mark Avara, Vassilios Mewes +6
We present an extension of the PatchworkMHD code [1], itself an MHD-capable extension of the Patchwork code [2], for which several algorithms presented here were co-developed. Its…
Stellar Tidal Disruption Events in General Relativity
Nicholas C. Stone, Michael Kesden, Roseanne M. Cheng +1
A tidal disruption event (TDE) ensues when a star passes too close to the supermassive black hole (SMBH) in a galactic center and is ripped apart by the tidal field of the SMBH. Th…
PATCHWORK: A Multipatch Infrastructure for Multiphysics/Multiscale/Multiframe Fluid Simulations
Hotaka Shiokawa, Roseanne M. Cheng, Scott C. Noble +1
We present a "multipatch" infrastructure for numerical simulation of fluid problems in which sub-regions require different gridscales, different grid geometries, different physical…
ASASSN-14li: A Model Tidal Disruption Event
Julian Krolik, Tsvi Piran, Gilad Svirski +1
ASASSN-14li is a recently-discovered tidal disruption event with an exceptionally rich data-set: spectra and lightcurves in soft X-rays, UV, optical, and radio. To understand its e…
"Circularization" vs. Accretion -- What Powers Tidal Disruption Events?
Tsvi Piran, Gilad Svirski, Julian Krolik +2
A tidal disruption event (TDE) takes place when a star passes near enough to a massive black hole to be disrupted. About half the star's matter is given elliptical trajectories wit…
General Relativistic Hydrodynamic Simulation of Accretion Flow from a Stellar Tidal Disruption
Hotaka Shiokawa, Julian H. Krolik, Roseanne M. Cheng +2
We study how the matter dispersed when a supermassive black hole tidally disrupts a star joins an accretion flow. Combining a relativistic hydrodynamic simulation of the stellar di…
Tidal disruption of a star in the Schwarzschild spacetime: relativistic effects in the return rate of debris
Roseanne M. Cheng, Tamara Bogdanovic
Motivated by an improved multi-wavelength observational coverage of the transient sky, we investigate the importance of relativistic effects in disruptions of stars by non-spinning…
Disruption of a Red Giant Star by a Supermassive Black Hole and the Case of PS1-10jh
Tamara Bogdanovic, Roseanne M. Cheng, Pau Amaro-Seoane
The development of a new generation of theoretical models for tidal disruptions is timely, as increasingly diverse events are being captured in surveys of the transient sky. Recent…
Relativistic effects in the tidal interaction between a white dwarf and a massive black hole in Fermi normal coordinates
Roseanne M. Cheng, Charles R. Evans
We consider tidal encounters between a white dwarf and an intermediate mass black hole. Both weak encounters and those at the threshold of disruption are modeled. The numerical cod…