Subsolar strange star mergers produce a lower post-merger-to-cutoff GW frequency ratio than neutron star mergers, cleanly separating the two classes across equations of state and mass ratios.
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5 Pith papers cite this work. Polarity classification is still indexing.
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Simulations show hierarchical subsolar-mass mergers in collapsar disks can retain eccentricity up to e~0.1 at merger as a potential observational signature.
No kilonova detected from sub-solar GW candidate S251112cm, but coincident IIb supernova SN 2025adtq yields suggestive evidence for the superkilonova channel, though inconclusive after accounting for chance coincidence.
SN 2025ulz, once a kilonova candidate for GW trigger S250818k, is a type IIb supernova, and type IIb shock-cooling tails should be expected as interlopers in roughly 30% of comparable GW follow-ups.
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.
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ENGRAVE follow-up of a type IIb supernova spatially coincident with the sub-threshold gravitational wave trigger S250818k
SN 2025ulz, once a kilonova candidate for GW trigger S250818k, is a type IIb supernova, and type IIb shock-cooling tails should be expected as interlopers in roughly 30% of comparable GW follow-ups.