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Neutron stars and stellar-mass black holes are the remnants of massive star explosions1. Most massive stars reside in close binary systems2, and the interplay between the companion star and the newly formed compact object has been theoretically explored3, but signatures for binarity or evidence for the formation of a compact object during a supernova explosion are still lacking. Here we report a stripped-envelope supernova, SN 2022jli, which shows 12.4-day periodic undulations during the declining light curve. Narrow Hα emission is detected in late-time spectra with concordant periodic velocity shifts, probably arising from hydrogen gas stripped from a companion and accreted onto the compact remnant. A new Fermi-LAT γ-ray source is temporally and positionally consistent with SN 2022jli. The observed properties of SN 2022jli, including periodic undulations in the optical light curve, coherent Hα emission shifting and evidence for association with a γ-ray source, poin ....

Nordrhein Westfalen , Az Arbayjane Sharqi , United States , Portegies Zwart , Freitas Pacheco , Sloan Digital Sky , Sexten Center , Optical Survey , Zwicky Transient Facility Phase , Astronomical Data Analysis Software , Leiden Argentine Bonn , Nuclear Spectroscopic Telescope Array Nustarx Ray , Keck Infrared Transient Survey , Society Of Photo , X Photometric Survey Telescope , Intermediate Palomar Transient , Discovery Report , Name Server Discovery Report , Early Data Release , Zwicky Transient Facility , Hubble Space Telescope Key Project , Wilkinson Microwave Anisotropy Probe , Hubble Space Telescope , Apache Point Observatory Catalog , Optical Diffuse Interstellar , Open Source Softw ,