62 citations · 193 across the 19 of their papers we have counts for
19 papers
Thermal X-ray signatures in late-stage unequal-mass massive black hole binary mergers
Luke Major Krauth, Jordy Davelaar, Zoltán Haiman +3
The multi-messenger combination of gravitational waves (GWs) from merging massive black hole binaries (MBHBs) and the electromagnetic (EM) counterpart from the surrounding circumbi…
Relativistic Binary Precession: Impact on Eccentric Binary Accretion and Multi-Messenger Astronomy
Stanislav DeLaurentiis, Zoltan Haiman, John Ryan Westernacher-Schneider +4
Recent hydrodynamical simulations have shown that circumbinary gas disks drive the orbits of binary black holes to become eccentric, even when general relativistic corrections to t…
Self-lensing flares from black hole binaries III: general-relativistic ray tracing of circumbinary accretion simulations
Luke Major Krauth, Jordy Davelaar, Zoltán Haiman +3
Self-lensing flares (SLFs) are expected to be produced once or twice per orbit by an accreting massive black hole binary (MBHB), if the eclipsing MBHBs are observed close to edge-o…
Multiwavelength Analysis of Fermi-LAT Blazars with High-Significance Periodicity: Detection of a Long-Term Rising Emission in PG 1553+113
P. Peñil, J. R. Westernacher-Schneider, M. Ajello +6
Blazars display variable emission across the entire electromagnetic spectrum, with timescales that can range from a few minutes to several years. Our recent work has shown that a s…
Constraining the PG 1553+113 binary hypothesis: interpreting hints of a new, 22-year period
Sagar Adhikari, Pablo Penil, John Ryan Westernacher-Schneider +5
PG 1553+113 is a well-known blazar exhibiting evidence of a -yr quasi-periodic oscillation (QPO) in radio, optical, X-ray, and -ray bands. Since QPO mechanisms often…
Eccentric Minidisks in Accreting Binaries
John Ryan Westernacher-Schneider, Jonathan Zrake, Andrew MacFadyen +1
We show that gas disks around the components of an orbiting binary system (so-called minidisks) may be susceptible to a resonant instability which causes the minidisks to become si…
Disappearing thermal X-ray emission as a tell-tale signature of merging massive black hole binaries
Luke Major Krauth, Jordy Davelaar, Zoltán Haiman +3
The upcoming Laser Interferometer Space Antenna (LISA) is expected to detect gravitational waves (GWs) from massive black hole binaries (MBHB). Finding the electromagnetic (EM) cou…
Search for Periodic Variability in -ray Blazars Using \textit{Fermi}-LAT
P. Peñil, M. Ajello, S. Buson +5
Blazars are known to exhibit variability across a broad range of timescales. This behavior can include periodicity in their -ray emission, whose clear detection remains an ongoi…
Multi-band light curves from eccentric accreting supermassive black hole binaries
John Ryan Westernacher-Schneider, Jonathan Zrake, Andrew MacFadyen +1
We use long-run, high-resolution hydrodynamics simulations to compute the multi-wavelength light curves (LCs) from thermal disk emission around accreting equal-mass supermassive bl…
Gamma-radiation sky maps from compact binaries
Néstor Ortiz, Federico Carrasco, Stephen R. Green +3
We study sky maps and light curves of gamma-ray emission from neutron stars in compact binaries, and in isolation. We briefly review some gamma-ray emission models, and reproduce s…
Extremely High-Order Convergence in Simulations of Relativistic Stars
John Ryan Westernacher-Schneider
We provide a road towards obtaining gravitational waveforms from inspiraling material binaries with an accuracy viable for third-generation gravitational wave detectors, without ne…
Exploration of Hamiltonian formulations of baroclinic hydrodynamics
John Ryan Westernacher-Schneider
A neutron star in a compact binary is expected to be well-approximated by a barotropic flow during the inspiral phase. During the merger phase, where tidal disruption and shock-hea…
Consistent perturbative modeling of pseudo-Newtonian core-collapse supernova simulations
John Ryan Westernacher-Schneider
We write down and apply the linearized fluid and gravitational equations consistent with pseudo-Newtonian simulations, whereby Newtonian hydrodynamics is used with a pseudo-Newtoni…
Hamilton-Jacobi hydrodynamics of pulsating relativistic stars
John Ryan Westernacher-Schneider, Charalampos Markakis, Bing Jyun Tsao
The dynamics of self-gravitating fluid bodies is described by the Euler-Einstein system of partial differential equations. The break-down of well-posedness on the fluid-vacuum inte…
Multimessenger Asteroseismology of Core-Collapse Supernovae
John Ryan Westernacher-Schneider, Evan O'Connor, Erin O'Sullivan +4
We investigate correlated gravitational wave and neutrino signals from rotating core-collapse supernovae with simulations. Using an improved mode identification procedure based on…
Turbulence, Gravity, and Multimessenger Asteroseismology
John Ryan Westernacher-Schneider
Part IA: We present numerical measurements of relativistic scaling relations in -dimensional conformal fluid turbulence, which perform favourably over their non-relativistic…
On the fractal dimension of turbulent black holes
John Ryan Westernacher-Schneider
We present measurements of the fractal dimension of a turbulent asymptotically anti-deSitter black brane reconstructed from simulated boundary fluid data at the perfect fluid order…
Numerical Measurements of Scaling Relations in Two-Dimensional Conformal Fluid Turbulence
John Ryan Westernacher-Schneider, Luis Lehner
We present measurements of relativistic scaling relations in -dimensional conformal fluid turbulence from direct numerical simulations, in the weakly compressible regime. Th…
Scaling Relations in Two-Dimensional Relativistic Hydrodynamic Turbulence
John Ryan Westernacher-Schneider, Luis Lehner, Yaron Oz
We derive exact scaling relations for two-dimensional relativistic hydrodynamic turbulence in the inertial range of scales. We consider both the energy cascade towards large scales…