Population synthesis from binary evolution models predicts periodic neutron star-companion interactions in more than half of surviving hydrogen-poor core-collapse supernovae, with periods peaking at 20-50 days and lasting 0.5-10 years.
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NLTE modeling of SN 2024ehs indicates low ejecta mass, ~20,000 km/s velocities, <0.1 solar masses of 56Ni, and a ~23 solar mass ZAMS progenitor with ~6 solar mass helium core.
SN 2025ngs is a short-plateau supernova resembling SN 1998S but fainter, with spectral evidence for interaction with a proximate ring-like circumstellar medium around a supergiant progenitor.
citing papers explorer
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Neutron star-companion interaction in core collapse supernovae. Population synthesis based on detailed binary evolution models
Population synthesis from binary evolution models predicts periodic neutron star-companion interactions in more than half of surviving hydrogen-poor core-collapse supernovae, with periods peaking at 20-50 days and lasting 0.5-10 years.
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NLTE Spectral Modelling of the Nearby Stripped-Envelope Supernova 2024ehs
NLTE modeling of SN 2024ehs indicates low ejecta mass, ~20,000 km/s velocities, <0.1 solar masses of 56Ni, and a ~23 solar mass ZAMS progenitor with ~6 solar mass helium core.
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The Eye of Sauron in SN 2025ngs: a Short-plateau Cousin of SN 1998S with Evidence for a Ring-like Circumstellar Medium
SN 2025ngs is a short-plateau supernova resembling SN 1998S but fainter, with spectral evidence for interaction with a proximate ring-like circumstellar medium around a supergiant progenitor.