Non-LTE models for He and Sr in kilonova ejecta show that ~1% He or 1-10% Sr can reproduce the 1μm absorption feature in AT2017gfo, implying low-Ye, low-entropy r-process conditions.
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SN2025ulz is a type IIb supernova whose shock-cooling tail mimicked a kilonova, demonstrating a key contaminant for gravitational-wave counterpart searches.
Lower BNS merger rates from GWTC-4 data produce tensions of factors 3.6-18 with SGRB rates, 0.9-4.1 with r-process rates, and 2.3-5.1 with Galactic DNS rates.
Latest GW neutron star merger rates are consistent with short GRBs being produced by BNS mergers if jets are wide or rates low, with NSBH mergers subdominant.
citing papers explorer
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Non-LTE Ionization Modeling for Helium and Strontium in Neutron Star Merger Ejecta
Non-LTE models for He and Sr in kilonova ejecta show that ~1% He or 1-10% Sr can reproduce the 1μm absorption feature in AT2017gfo, implying low-Ye, low-entropy r-process conditions.
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ENGRAVE follow-up of a type IIb supernova spatially coincident with the sub-threshold gravitational wave trigger S250818k
SN2025ulz is a type IIb supernova whose shock-cooling tail mimicked a kilonova, demonstrating a key contaminant for gravitational-wave counterpart searches.
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Implications of low neutron star merger rates for gamma-ray bursts, r-process production and Galactic double neutron stars
Lower BNS merger rates from GWTC-4 data produce tensions of factors 3.6-18 with SGRB rates, 0.9-4.1 with r-process rates, and 2.3-5.1 with Galactic DNS rates.
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Wide Jets or Low Rates: Reconciling Short GRB and Gravitational-Wave Neutron Star Merger Rates
Latest GW neutron star merger rates are consistent with short GRBs being produced by BNS mergers if jets are wide or rates low, with NSBH mergers subdominant.