A 12.4-day periodicity in a close binary system after a supernova

Ping Chen*, Avishay Gal-Yam, Jesper Sollerman, Steve Schulze, Richard S. Post, Chang Liu, Eran O. Ofek, Kaustav K. Das, Christoffer Fremling, Assaf Horesh, Boaz Katz, Doron Kushnir, Mansi M. Kasliwal, Shri R. Kulkarni, Dezi Liu, Xiangkun Liu, Adam A. Miller, Kovi Rose, Eli Waxman, Sheng YangYuhan Yao, Barak Zackay, Eric C. Bellm, Richard Dekany, Andrew J. Drake, Yuan Fang, Johan P.U. Fynbo, Steven L. Groom, George Helou, Ido Irani, Theophile Jegou du Laz, Xiaowei Liu, Paolo A. Mazzali, James D. Neill, Yu Jing Qin, Reed L. Riddle, Amir Sharon, Nora L. Strotjohann, Avery Wold, Lin Yan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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, point to the explosion of a massive star in a binary system leaving behind a bound compact remnant. Mass accretion from the companion star onto the compact object powers the light curve of the supernova and generates the γ-ray emission.

Original languageAmerican English
Pages (from-to)253-258
Number of pages6
Issue number7994
StatePublished - 11 Jan 2024

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© 2024, The Author(s), under exclusive licence to Springer Nature Limited.


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