The Preexplosion Environments and the Progenitor of SN 2023ixf from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX)

Liu, Chenxu; Chen, Xinlei; Er, Xinzhong; Zeimann, Gregory R.; Vinkó, József; Wheeler, J. Craig; Cooper, Erin Mentuch; Davis, Dustin; Farrow, Daniel J.; Gebhardt, Karl; Guo, Helong; Hill, Gary J.; House, Lindsay; Kollatschny, Wolfram; Kong, Fanchuan; Kumar, Brajesh; Liu, Xiangkun; Tuttle, Sarah; Endl, Michael; Duke, Parker; Cochran, William D.; Zhang, Jinghua; Liu, Xiaowei

Abstract

Supernova (SN) 2023ixf was discovered on 2023 May 19. The host galaxy, M101, was observed by the Hobby-Eberly Telescope Dark Energy Experiment collaboration over the period 2020 April 30-2020 July 10, using the Visible Integral-field Replicable Unit Spectrograph (3470 ≲ λ ≲ 5540 Å) on the 10 m Hobby-Eberly Telescope. The fiber filling factor within ±30″ of SN 2023ixf is 80% with a spatial resolution of 1″. The r < 5.″5 surroundings are 100% covered. This allows us to analyze the spatially resolved preexplosion local environments of SN 2023ixf with nebular emission lines. The two-dimensional maps of the extinction and the star formation rate (SFR) surface density (ΣSFR) show weak increasing trends in the radial distributions within the r < 5.″5 regions, suggesting lower values of extinction and SFR in the vicinity of the progenitor of SN 2023ixf. The median extinction and that of the surface density of SFR within r < 3″ are E(B − V) = 0.06 ± 0.14, and Σ SFR = 10 − 5.44 ± 0.66 M ☉ yr − 1 arcsec − 2 . There is no significant change in extinction before and after the explosion. The gas metallicity does not change significantly with the separation from SN 2023ixf. The metal-rich branch of the R 23 calculations indicates that the gas metallicity around SN 2023ixf is similar to the solar metallicity (∼Z ☉). The archival deep images from the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) show a clear detection of the progenitor of SN 2023ixf in the z band at 22.778 ± 0.063 mag, but nondetections in the remaining four bands of CFHTLS (u, g, r, i). The results suggest a massive progenitor of ≈22 M ☉

Citation

Liu, C., Chen, X., Er, X., Zeimann, G. R., Vinkó, J., Wheeler, J. C., …Liu, X. (2023). The Preexplosion Environments and the Progenitor of SN 2023ixf from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). Astrophysical journal. Letters, 958(2), Article L37. https://doi.org/10.3847/2041-8213/ad0da8

• Journal Article Type: Article
• Acceptance Date: Nov 17, 2023
• Online Publication Date: Nov 30, 2023
• Publication Date: Dec 1, 2023
• Deposit Date: Apr 17, 2024
• Publicly Available Date: Apr 23, 2024
• Journal: Astrophysical Journal Letters
• Print ISSN: 2041-8205
• Electronic ISSN: 2041-8213
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 958
• Issue: 2
• Article Number: L37
• DOI: https://doi.org/10.3847/2041-8213/ad0da8
• Public URL: https://hull-repository.worktribe.com/output/4626237