6 papers
No Evidence for Nearby Circumstellar Material in the Type Ia Supernova 2025rbs
Aravind P. Ravi, Griffin Hosseinzadeh, Stefano Valenti +28
We present a high-resolution spectral time series of the Type Ia supernova (SN) 2025rbs discovered in the nearby galaxy NGC 7331. The Automated Planet Finder (APF) at Lick Observat…
From Primordial Stars to Early Galaxies: A Semi-Analytic Model Calibrated with Aeos and Renaissance
Ryan Hazlett, Jennifer Mead, Eli Visbal +6
We present an extension of our semi-analytic model that follows the formation of Population III stars and their metal-enriched descendants, incorporating dark matter halo merger tr…
Evaluating the Accuracy of Reionization Prescriptions in Semi-analytic Models of the First Stars and Galaxies
Thomas Behling, Ryan Hazlett, Mihir Kulkarni +1
Semi-analytic models are a valuable tool to study the first stars and galaxies. Their numerical efficiency makes it possible to survey broad regions of astrophysical parameter spac…
Radiative Transfer Simulations of Ly Intensity Mapping During Cosmic Reionization Including Sources from Galaxies and the Intergalactic Medium
Abigail E. Ambrose, Eli Visbal, Mihir Kulkarni +1
We present new simulations of Lyman- (Ly) intensity maps that include Ly radiative transfer in the intergalactic medium (IGM) and all significant sources of Ly phot…
Can supermassive stars form in protogalaxies due to internal Lyman-Werner feedback?
James Sullivan, Zoltan Haiman, Mihir Kulkarni +1
Population III stars are possible precursors to early massive and supermassive black holes (BHs). The presence of soft UV Lyman Werner (LW) background radiation can suppress Popula…
From Dark Matter Minihalos to Large-Scale Radiative Feedback: A Self-Consistent 3D Simulation of the First Stars and Galaxies using Neural Networks
Colton Feathers, Mihir Kulkarni, Eli Visbal
A key obstacle to accurate models of the first stars and galaxies is the vast range of distance scales that must be considered. While star formation occurs on sub-parsec scales wit…