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- W2022072374 abstract "Core-collapse supernovae (SNe) are the spectacular finale to massive stellar evolution. In this Letter, we identify a progenitor for the nearby core-collapse SN 2012aw in both ground based near-infrared, and space based optical pre-explosion imaging. The SN itself appears to be a normal Type II Plateau event, reaching a bolometric luminosity of 10$^{42}$ erg s$^{-1}$ and photospheric velocities of $sim$11,000 kms from the position of the H$beta$ P-Cygni minimum in the early SN spectra. We use an adaptive optics image to show that the SN is coincident to within 27 mas with a faint, red source in pre-explosion HST+WFPC2, VLT+ISAAC and NTT+SOFI images. The source has magnitudes $F555W$=26.70$pm$0.06, $F814W$=23.39$pm$0.02, $J$=21.1$pm$0.2, $K$=19.1$pm$0.4, which when compared to a grid of stellar models best matches a red supergiant. Interestingly, the spectral energy distribution of the progenitor also implies an extinction of $A_V>$1.2 mag, whereas the SN itself does not appear to be significantly extinguished. We interpret this as evidence for the destruction of dust in the SN explosion. The progenitor candidate has a luminosity between 5.0 and 5.6 log L/lsun, corresponding to a ZAMS mass between 14 and 26 msun (depending on $A_V$), which would make this one of the most massive progenitors found for a core-collapse SN to date." @default.
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- W2022072374 date "2012-10-15" @default.
- W2022072374 modified "2023-10-18" @default.
- W2022072374 title "RED AND DEAD: THE PROGENITOR OF SN 2012aw IN M95" @default.
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- W2022072374 doi "https://doi.org/10.1088/2041-8205/759/1/l13" @default.
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