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DOE OSTI · 3375452

Kilonovae and Long-duration Gamma-Ray Bursts

Ristić, Marko [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000170424472)·Barker, Brandon Lynn [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000288250893)·Cupp, Samuel Douglas [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000317588376)·Gross, Axel Paul [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000278934183)·Lloyd-Ronning, Nicole Marie [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000317077998)·Korobkin, Oleg [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000341565342)·Miller, Jonah Maxwell [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000164327860)·Mumpower, Matthew Ryan [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); University of Notre Dame, IN (United States); Obsidian Research, Fort Wayne, IN (United States)] (ORCID:0000000299509688)
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Abstract

Recent detections of kilonova-like emission following long-duration gamma-ray bursts GRB 211211A and GRB 230307A have been interpreted as originating from the merger of two neutron stars. In this work, we demonstrate that these observations are also consistent with nucleosynthesis originating from a collapsar scenario. Our model is capable of reproducing the observed optical and infrared light curves using a single, weak r-process component. The absence of lanthanide-rich material in our model, consistent with the data, challenges the prevailing interpretation that a red evolution in such transients necessarily indicates the presence of heavy r-process elements.

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79 ASTRONOMY AND ASTROPHYSICS97 MATHEMATICS AND COMPUTINGcollapsarcore-collapse supernovaegamma-ray burstskilonovanucleosynthesisr-process

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Ristić, Marko [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000170424472), Barker, Brandon Lynn [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000288250893), Cupp, Samuel Douglas [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000317588376), Gross, Axel Paul [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000278934183), Lloyd-Ronning, Nicole Marie [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000317077998), Korobkin, Oleg [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000341565342), Miller, Jonah Maxwell [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)] (ORCID:0000000164327860), Mumpower, Matthew Ryan [Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); University of Notre Dame, IN (United States); Obsidian Research, Fort Wayne, IN (United States)] (ORCID:0000000299509688). 2026-04-27. Kilonovae and Long-duration Gamma-Ray Bursts. https://doi.org/10.3847/2041-8213%2Fae5e53

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