Chen, P, Gal-Yam, A, Sollerman, J, Schulze, S, Post, RS, Liu, C, Ofek, EO, Das, KK, Fremling, C, Horesh, A, Katz, B, Kushnir, D, Kasliwal, MM, Kulkarni, SR, Liu, D, Liu, X, Miller, AA, Rose, K, Waxman, E, Yang, S et al, Yao, Y, Zackay, B, Bellm, EC, Dekany, R, Drake, AJ, Fang, Y, Fynbo, JPU, Groom, SL, Helou, G, Irani, I, Jegou du Laz, T, Liu, X, Mazzali, PA, Neill, JD, Qin, YJ, Riddle, RL, Sharon, A, Strotjohann, NL, Wold, A and Yan, L (2024) A12.4-day periodicity in a close binary system after a supernova. Nature, 625. pp. 253-258. ISSN 0028-0836

Text A 12 4 day periodicity in a close binary system after a supernova.pdf - Accepted Version Restricted to Repository staff only until 10 July 2024. Download (12MB)

Abstract

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.

Item Type:	Article
Additional Information:	This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://doi.org/10.1038/s41586-023-06787-x
Uncontrolled Keywords:	General Science & Technology
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Springer Nature
SWORD Depositor:	A Symplectic
Date Deposited:	08 Feb 2024 14:40
Last Modified:	08 Feb 2024 14:45
DOI or ID number:	10.1038/s41586-023-06787-x
URI:	https://researchonline.ljmu.ac.uk/id/eprint/22531

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