86 citations · 297 across the 17 of their papers we have counts for
17 papers
Benchmarking Machine Learning Emulators of Stellar Evolution for Precision Asteroseismology
Naomi Gluck, Earl P. Bellinger, Yan Liang +5
Fast and accurate stellar evolution emulators---surrogate models that approximate expensive simulation outputs with machine learning (ML)---are powerful tools for modern stellar ch…
Solar-like oscillations in accreting pre-main sequence stars: Insights and prospects
Johannes Jørgensen, Konstanze Zwintz, Ebraheem Farag +2
We present theoretical predictions for solar-like oscillators in the pre-main sequence phase of stellar evolution. Our pre-main sequence models start from a stellar seed of 0.01 so…
Evolutionary Tracks and Spectral Properties of Quasi-stars and Their Correlation with Little Red Dots
Andrew D. Santarelli, Ebraheem Farag, Earl P. Bellinger +4
JWST has revealed a population of red, compact, high-redshift () objects referred to as ``Little Red Dots'' (LRDs). These objects exhibit unusual spectral features rem…
MESA-QUEST: Tracing the formation of direct collapse black hole seeds via quasi-stars
Andrew D. Santarelli, Claire B. Campbell, Ebraheem Farag +3
The origin of the first supermassive black holes (SMBHs) observed at redshifts remains one of the most challenging open questions in astrophysics. Their rapid emergence s…
Nuclear Neural Networks: Emulating Late Burning Stages in Core Collapse Supernova Progenitors
Aldana Grichener, Mathieu Renzo, Wolfgang E. Kerzendorf +7
One of the main challenges in modeling massive stars to the onset of core collapse is the computational bottleneck of nucleosynthesis during advanced burning stages. The number of…
An Expanded Set of Los Alamos OPLIB Tables in MESA: Type-1 Rosseland-mean Opacities and Solar Models
Ebraheem Farag, Christopher J. Fontes, F. X. Timmes +11
We present a set of 1194 Type-1 Rosseland-mean opacity tables for four different metallicity mixtures. These new Los Alamos OPLIB atomic radiative opacity tables are an order of ma…
Photons from neutrinos: the gamma ray echo of a supernova neutrino burst
Cecilia Lunardini, Joshua Loeffler, Mainak Mukhopadhyay +3
When a star undergoes core collapse, a vast amount of energy is released in a ~10 s long burst of neutrinos of all species. Inverse beta decay in the star's hydrogen envelope cause…
Stellar Neutrino Emission Across The Mass-Metallicity Plane
Ebraheem Farag, F. X. Timmes, Morgan T. Chidester +2
We explore neutrino emission from nonrotating, single star models across six initial metallicities and seventy initial masses from the zero-age main sequence to the final fate. Ove…
Seismic Signatures of the C(, )O Reaction Rate in White Dwarf Models with Overshooting
Morgan T. Chidester, F. X. Timmes, Ebraheem Farag
We consider the combined effects that overshooting and the C(, )O reaction rate have on variable white dwarf stellar models. We find that carbon-oxygen white dw…
Resolving The Peak Of The Black Hole Mass Spectrum
Ebraheem Farag, Mathieu Renzo, Robert Farmer +2
Gravitational wave (GW) detections of binary black hole (BH) mergers have begun to sample the cosmic BH mass distribution. The evolution of single stellar cores predicts a gap in t…
JWST Imaging of Earendel, the Extremely Magnified Star at Redshift
Brian Welch, Dan Coe, Erik Zackrisson +60
The gravitationally lensed star WHL0137-LS, nicknamed Earendel, was identified with a photometric redshift based on images taken with the Hubble Space Tele…
On Trapped Modes In Variable White Dwarfs As Probes Of The C()O Reaction Rate
Morgan T. Chidester, Ebraheem Farag, F. X. Timmes
We seek signatures of the current experimental CO reaction rate probability distribution function in the pulsation periods of carbon-oxygen white dwarf models. W…
Observing intermediate-mass black holes and the upper--stellar-mass gap with LIGO and Virgo
Ajit Kumar Mehta, Alessandra Buonanno, Jonathan Gair +5
Using ground-based gravitational-wave detectors, we probe the mass function of intermediate-mass black holes (IMBHs) wherein we also include BHs in the upper mass gap $\sim 60-130~…
On The Impact Of 22Ne On The Pulsation Periods Of Carbon-Oxygen White Dwarfs With Helium Dominated Atmospheres
Morgan T. Chidester, F. X. Timmes, Josiah Schwab +6
We explore changes in the adiabatic low-order g-mode pulsation periods of 0.526, 0.560, and 0.729 M carbon-oxygen white dwarf models with helium-dominated envelopes due to…
On Stellar Evolution In A Neutrino Hertzsprung-Russell Diagram
Ebraheem Farag, F. X. Timmes, Morgan Taylor +2
We explore the evolution of a select grid of solar metallicity stellar models from their pre-main sequence phase to near their final fates in a neutrino Hertzsprung-Russell diagram…
Investigating Opacity Modifications and Reaction Rate Uncertainties to Resolve the Cepheid Mass Discrepancy
Joyce A. Guzik, Ebraheem Farag, Jakub Ostrowski +4
Cepheid masses derived from pulsations or binary dynamics are generally lower than those derived from stellar evolution models. Recent efforts have been dedicated to investigating…
Sound speed and oscillation frequencies for solar models evolved with Los Alamos ATOMIC opacities
Joyce A. Guzik, C. J. Fontes, P. Walczak +3
Los Alamos National Laboratory has calculated a new generation of radiative opacities (OPLIB data using the ATOMIC code) for elements with atomic number Z=1-30 with improved physic…