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arXiv · 2310.01514

The search for failed supernovae with the Large BinocularTelescope: The Mid-IR Counterpart to N6946-BH1

C. S. Kochanek·J. M. M. Neustadt·K. Z. Stanek
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Abstract

We present JWST MIRI 5.6, 10 and 21 micron observations of the candidate failed supernova N6946-BH1 along with HST WFPC/IR 1.1 and 1.6 micron data and ongoing optical monitoring data with the LBT. There is a very red, dusty source at the location of the candidate which has only ~10-15% of the luminosity of the progenitor star. The source is very faint in the HST near-IR observations (~10^3 Lsun) and is not optically variable to a limit of ~10^3 Lsun at R-band. The dust is likely silicate and probably has to be dominated by very large grains as predicted for dust formed in a failed SN. The required visual optical depths are modest, so we should begin to have a direct view of the source in the near-IR in only a few years.

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C. S. Kochanek, J. M. M. Neustadt, K. Z. Stanek. 2023-10-02. The search for failed supernovae with the Large BinocularTelescope: The Mid-IR Counterpart to N6946-BH1. https://arxiv.org/abs/2310.01514

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