223 citations · 1.7k across the 45 of their papers we have counts for
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Nuclear uncertainties associated with the ejecta of a neutron-star black-hole accretion disk
M. R. Mumpower, T. M. Sprouse, J. M. Miller +5
The simulation of heavy element nucleosynthesis requires input from yet-to-be-measured nuclear properties. The uncertainty in the values of these off-stability nuclear properties p…
Emergent nucleosynthesis from a 1.2 second long simulation of a black-hole accretion disk
T. M. Sprouse, K. A. Lund, J. M. Miller +2
We simulate a black-hole accretion disk system with full-transport general relativistic neutrino radiation magnetohydrodynamics (GRRMHD) for 1.2 seconds. This system is likely t…
Superheavy Elements in Kilonovae
Erika M. Holmbeck, Jennifer Barnes, Kelsey A. Lund +3
As LIGO-Virgo-KAGRA enters its fourth observing run, a new opportunity to search for electromagnetic counterparts of compact object mergers will also begin. The light curves and sp…
Nucleosynthesis in Outflows from Black Hole-Neutron Star Merger Disks With Full GRRMHD
Sanjana Curtis, Jonah M. Miller, Carla Frohlich +3
Along with binary neutron star mergers, the in-spiral and merger of a black hole and a neutron star is a predicted site of -process nucleosynthesis and associated kilonovae. For…
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…
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…
Sensitivity of Neutron-Rich Nuclear Isomer Behavior to Uncertainties in Direct Transitions
G. Wendell Misch, Trevor M. Sprouse, Matthew R. Mumpower +4
Nuclear isomers are populated in the rapid neutron capture process (r process) of nucleosynthesis. The r process may cover a wide range of temperatures, potentially starting from s…
Isochronic evolution and the radioactive decay of r-process nuclei
T. M. Sprouse, G. Wendell Misch, M. R. Mumpower
We report on the creation and application of a novel decay network that uses the latest data from experiment and evaluation. We use the network to simulate the late-time phase of t…
Astromers in the radioactive decay of r-process nuclei
G. Wendell Misch, T. M. Sprouse, M. R. Mumpower
We study the impact of astrophysically relevant nuclear isomers (astromers) in the context of the rapid neutron capture process (r-process) nucleosynthesis. We compute thermally me…
Kilonovae across the nuclear physics landscape: The impact of nuclear physics uncertainties on r-process-powered emission
Jennifer Barnes, Y. L. Zhu, K. A. Lund +5
Merging neutron stars produce "kilonovae"---electromagnetic transients powered by the decay of unstable nuclei synthesized via rapid neutron capture (the r-process) in material tha…
Modeling Kilonova Light Curves: Dependence on Nuclear Inputs
Y. L. Zhu, K. Lund, J. Barnes +5
The mergers of binary neutron stars, as well as black hole-neutron star systems, are expected to produce an electromagnetic counterpart that can be analyzed to infer the element sy…
Reconstructing Masses of Merging Neutron Stars from Stellar -Process Abundance Signatures
Erika M. Holmbeck, Anna Frebel, G. C. McLaughlin +5
Neutron star mergers (NSMs) are promising astrophysical sites for the rapid neutron-capture ("-") process, but can their integrated yields explain the majority of heavy-element…
MeV Gamma Rays from Fission: A Distinct Signature of Actinide Production in Neutron Star Mergers
Xilu Wang, Nicole Vassh, Trevor Sprouse +4
Neutron star mergers (NSMs) are the first verified sites of rapid neutron capture (r-process) nucleosynthesis, and could emit gamma rays from the radioactive isotopes synthesized i…
Spallation of r-Process Nuclei Ejected from a Neutron Star Merger
Xilu Wang, Brian D. Fields, Matthew Mumpower +3
Neutron star mergers (NSMs) are rapid neutron capture (r-process) nucleosynthesis sites, which eject materials at high velocities, from 0.1c to as high as 0.6c. Thus the r-process…
Characterizing -Process Sites through Actinide Production
Erika M. Holmbeck, Rebecca Surman, Anna Frebel +6
Of the variations in the elemental abundance patterns of stars enhanced with -process elements, the variation in the relative actinide-to-lanthanide ratio is among the most sign…
Full Transport General Relativistic Radiation Magnetohydrodynamics for Nucleosynthesis in Collapsars
Jonah M. Miller, Trevor M. Sprouse, Christopher L. Fryer +4
We model a compact black hole-accretion disk system in the collapsar scenario with full transport, frequency dependent, general relativistic radiation magnetohydrodynamics. We exam…
Co-production of light and heavy -process elements via fission deposition
Nicole Vassh, Matthew R. Mumpower, Gail C. McLaughlin +2
We apply for the first time fission yields determined across the chart of nuclides from the macroscopic-microscopic theory of the Finite Range Liquid Drop Model to simulations of r…
Sandblasting the -Process: Spallation of Ejecta from Neutron Star Mergers
Xilu Wang, Brian D. Fields, Matthew Mumpower +3
Neutron star mergers (NSMs) are rapid neutron capture (-process) nucleosynthesis sites that expel matter at high velocities, from to as high as . Nuclei ej…
Gamma-rays from kilonova: a potential probe of r-process nucleosynthesis
Oleg Korobkin, Aimee M. Hungerford, Christopher L. Fryer +11
The mergers of compact binaries with at least one neutron star component are the potential leading sites of the production and ejection of -process elements. Discoveries of gala…
Actinide-rich and Actinide-poor -Process Enhanced Metal-Poor Stars do not Require Separate -Process Progenitors
Erika M. Holmbeck, Anna Frebel, G. C. McLaughlin +3
The astrophysical production site of the heaviest elements in the universe remains a mystery. Incorporating heavy element signatures of metal-poor, -process enhanced stars into…
Catching Element Formation In The Act
Chris L. Fryer, Frank Timmes, Aimee L. Hungerford +216
Gamma-ray astronomy explores the most energetic photons in nature to address some of the most pressing puzzles in contemporary astrophysics. It encompasses a wide range of objects…
FRIB and the GW170817 Kilonova
A. Aprahamian, R. Surman, A. Frebel +45
In July 2018 an FRIB Theory Alliance program was held on the implications of GW170817 and its associated kilonova for r-process nucleosynthesis. Topics of discussion included the a…
Californium-254 and kilonova light curves
Y. Zhu, R. T. Wollaeger, N. Vassh +13
Neutron star mergers offer unique conditions for the creation of the heavy elements and additionally provide a testbed for our understanding of this synthesis known as the -proc…