The progenitor mass of SN 2022acko inferred from pre-explosion images (7.5 Msun) disagrees with masses from light-curve and spectral modeling (9-15 Msun), with the tension likely caused by model and calibration systematics.
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SN 2022acko and the Properties of its Red Supergiant Progenitor: Direct Detection, Light Curves, and Nebular Spectroscopy
The progenitor mass of SN 2022acko inferred from pre-explosion images (7.5 Msun) disagrees with masses from light-curve and spectral modeling (9-15 Msun), with the tension likely caused by model and calibration systematics.