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arXiv · 1712.03957

The quiescent progenitors of four Type II-P/L supernovae

Samson A. Johnson·C. S. Kochanek·S. M. Adams
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Abstract

We present Large Binocular Telescope difference imaging data for the final years of four Type II-P/L supernovae progenitors. For all four, we find no significant evidence for stochastic or steady variability in the U, B, V, or R-bands. Our limits constrain variability to no more than roughly 5-10% of the expected R-band luminosities of the progenitors. These limits are comparable to the observed variability of red supergiants in the Magellanic Clouds. Based on these four events, the probability of a Type II-P/L progenitor having an extended outburst after Oxygen ignition is <37% at 90% confidence. Our observations cannot exclude short outbursts in which the progenitor returns to within ~10% of its quiescent flux on the time scale of months with no dust formation.

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Samson A. Johnson, C. S. Kochanek, S. M. Adams. 2017-12-11. The quiescent progenitors of four Type II-P/L supernovae. https://doi.org/10.1093/mnras%2Fsty1966

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