888 citations · 4.4k across the 47 of their papers we have counts for
47 papers
Beta-Particle Transport and Thermalization in Kilonova Ejecta with Detailed Atomic Microphysics
Zachary L. Andalman, Christopher L. Fryer, Christopher J. Fontes +2
When two neutron stars collide, they eject material containing heavy nuclei formed by the rapid neutron capture process (-process). As these nuclei decay, they power a bright op…
A comparison of three neodymium atomic data sets for kilonova modeling
Christopher J. Fontes, Nicholas Vieira, Chris L. Fryer +4
We examine the impact of input neodymium (Nd) atomic data on the light curves and spectra of kilonovae, probing the sensitivity of kilonova observables to the atomic physics of thi…
A Method for Thermal Radiation Transport Using Backward Characteristic Tracing
J. C. Dolence, H. R. Hammer, H. Park +3
Thermal radiation transport is a challenging problem in computational physics that has long been approached primarily in one of a few standard ways: approximate moment methods (for…
Asymptotic constraints for 1D planar grey photon diffusion from linear transport with special-relativistic effects
Ryan T. Wollaeger, Jim E. Morel, Kendra P. Long +2
We derive a grey linear diffusion equation for photons with respect to inertial (or lab-frame) space and time, using asymptotic analysis in 1D planar geometry. The solution of the…
Joint Electromagnetic and Gravitational Wave Inference of Binary Neutron Star Merger GW170817 Using Forward-Modeling Ejecta Predictions
Marko Ristić, Richard O'Shaughnessy, Kate Wagner +5
We reassess the capacity for multimessenger inference of AT2017gfo/GW170817 using both kilonova and gravitational wave emission within the context of a recent simulation-based surr…
Kilonova Light-Curve Interpolation with Neural Networks
Yinglei Peng, Marko Ristić, Atul Kedia +7
Kilonovae are the electromagnetic transients created by the radioactive decay of freshly synthesized elements in the environment surrounding a neutron star merger. To study the fun…
On a spectral method for -particle bound excitation collisions in kilonovae
Ryan T. Wollaeger, Chris L. Fryer, Robert Chiodi +9
The interaction of -particles with the weakly ionized plasma background is an important mechanism for powering the kilonova transient signal from neutron star mergers. For this…
The Effect of the Velocity Distribution on Kilonova Emission
Chris L. Fryer, Aimee L. Hungerford, Ryan T. Wollaeger +7
The electromagnetic emission from the non-relativistic ejecta launched in neutron star mergers (either dynamically or through a disk wind) has the potential to probe both the total…
The LIGO HET Response (LIGHETR) Project to Discover and Spectroscopically Follow Optical Transients Associated with Neutron Star Mergers
M. J. Bustamante-Rosell, Greg Zeimann, J. Craig Wheeler +20
The LIGO HET Response (LIGHETR) project is an enterprise to follow up optical transients (OT) discovered as gravitational wave merger sources by the LIGO/Virgo collaboration (LVC).…
Monte Carlo Radiation Transport for Astrophysical Transients Powered by Circumstellar Interaction
Gururaj A. Wagle, Emmanouil Chatzopoulos, Ryan Wollaeger +1
In this paper, we introduce \texttt{SuperLite}, an open-source Monte Carlo radiation transport code designed to produce synthetic spectra for astrophysical transient phenomena affe…
Multi-Messenger Diagnostics of the Engine behind Core-Collapse Supernovae
Christopher L. Fryer, Eric Burns, Aimee Hungerford +6
Core-collapse supernova explosions play a wide role in astrophysics by producing compact remnants (neutron stars, black holes) and the synthesis and injection of many heavy element…
Interpolated kilonova spectra models: necessity for a phenomenological, blue component in the fitting of AT2017gfo spectra
Marko Ristic, Richard O'Shaughnessy, V. Ashley Villar +5
In this work, we present a simple interpolation methodology for spectroscopic time series, based on conventional interpolation techniques (random forests) implemented in widely-ava…
Surrogate light curve models for kilonovae with comprehensive wind ejecta outflows and parameter estimation for AT2017gfo
Atul Kedia, Marko Ristic, Richard O'Shaughnessy +6
The electromagnetic emission resulting from neutron star mergers have been shown to encode properties of the ejected material in their light curves. The ejecta properties inferred…
Abundances and Transients from Neutron Star-White Dwarf Mergers
Mark Alexander Kaltenborn, Chris L. Fryer, Ryan T. Wollaeger +3
We systematically investigate the mergers of neutron star-white dwarf binaries from beginning to end, with focus on the properties of the inflows and outflows in accretion disks an…
Actinide opacities for modeling the spectra and light curves of kilonovae
C. J. Fontes, C. L. Fryer, R. T. Wollaeger +2
We extend previous ab initio calculations of lanthanide opacities (Fontes et al., 2020, MNRAS, 493, 4143) to include a complete set of actinide opacities for use in the modeling of…
StaNdaRT: A repository of standardized test models and outputs for supernova radiative transfer
Stéphane Blondin, Sergei Blinnikov, Fionntan P. Callan +26
We present the first results of a comprehensive supernova (SN) radiative-transfer (RT) code-comparison initiative (StaNdaRT), where the emission from the same set of standardized t…
A nearby long gamma-ray burst from a merger of compact objects
E. Troja, C. L. Fryer, B. O'Connor +21
Gamma-ray bursts (GRBs) are flashes of high-energy radiation arising from energetic cosmic explosions. Bursts of long (>2 s) duration are produced by the core-collapse of massive s…
Constraining inputs to realistic kilonova simulations through comparison to observed -process abundances
M. Ristic, E. M. Holmbeck, R. Wollaeger +7
Kilonovae, one source of electromagnetic emission associated with neutron star mergers, are powered by the decay of radioactive isotopes in the neutron-rich merger ejecta. Models f…
Kilonova Detectability with Wide-Field Instruments
Eve A. Chase, Brendan O'Connor, Christopher L. Fryer +7
Kilonovae are ultraviolet, optical, and infrared transients powered by the radioactive decay of heavy elements following a neutron star merger. Joint observations of kilonovae and…
A Broad Grid of 2D Kilonova Emission Models
R. T. Wollaeger, C. L. Fryer, E. A. Chase +6
Depending upon the properties of their compact remnants and the physics included in the models, simulations of neutron star mergers can produce a broad range of ejecta properties.…
Interpolating Detailed Simulations of Kilonovae: Adaptive Learning and Parameter Inference Applications
M. Ristic, E. Champion, R. O'Shaughnessy +6
Detailed radiative transfer simulations of kilonovae are difficult to apply directly to observations; they only sparsely cover simulation parameters, such as the mass, velocity, mo…
A tale of two mergers: constraints on kilonova detection in two short GRBs at z0.5
B. O'Connor, E. Troja, S. Dichiara +15
We present a detailed multi-wavelength analysis of two short Gamma-Ray Bursts (sGRBs) detected by the Neil Gehrels Swift Observatory: GRB 160624A at and GRB 200522A at $z…
Core-Collapse Supernovae: From Neutrino-Driven 1D Explosions to Light Curves and Spectra
Sanjana Curtis, Noah Wolfe, Carla Fröhlich +3
We present bolometric and broadband light curves and spectra for a suite of core-collapse supernova models exploded self-consistently in spherical symmetry within the PUSH framewor…
A search for optical and near-infrared counterparts of the compact binary merger GW190814
A. L. Thakur, S. Dichiara, E. Troja +29
We report on our observing campaign of the compact binary merger GW190814, detected by the Advanced LIGO and Advanced Virgo detectors on August 14th, 2019. This signal has the best…