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Free Neutron Decay in Kilonova Ejecta: X-ray/UV Flashes with Non-Thermal Effects
Daniel Brethauer, Daniel Kasen, Smaranika Banerjee +2
Neutron star-bearing compact-object mergers can create a kilonova, a transient powered by the radioactive decay of material synthesized via rapid neutron capture (-process). Dur…
Recombination Rates for Uranium Ions Using the Analogous Nd III as a Guideline and Their Effect on Kilonova Nebular SpectraAn Exploration of Recombination of Uranium with application to Kilonovae Spectra
Niamh Ferguson, Anders Jerkstrand, Smaranika Banerjee +2
Dielectronic recombination (DR) is expected to be the dominant recombination process during the non-local thermodynamic equilibrium (non-LTE) phase of kilonovae, yet reliable DR da…
Ultraviolet Signatures of Jet-Ejecta Interaction in Early Kilonovae: Prediction from Realistic Atomic Opacities
Smaranika Banerjee, Hamid Hamidani, Kyohei Kawaguchi +1
We investigate the signature of the jet-ejecta interaction in early kilonova (t < 1day) using detailed atomic opacities developed in Banerjee et al. (2020, 2024), appropriate for e…
Nebular spectra of kilonovae with detailed recombination rates -- I. Light r-process composition
Smaranika Banerjee, Anders Jerkstrand, Nigel Badnell +3
To investigate spectra of kilonovae in the NLTE phase (t>= 1 week), we perform atomic calculations for dielectronic recombination (DR) rates for the light r-process elements Se (Z…