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

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 less than or similar to lambda less than or similar to 5540 angstrom) 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 (Sigma(SFR)) 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 Sigma(SFR) = 10(-5.44 +/- 0.66) M-circle dot 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 (similar to Z(circle dot)). 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 approximate to 22 M-circle dot.