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AT 2020mot is a typical UV/optical tidal disruption event (TDE) with no radioor X-ray signatures in a quiescent host. We find an i-band excess andre-brightening along the decline of the light curve which could be due to twoconsecutive dust echoes from a TDE. We model our observations following vanVelzen et al. (2016) and find that the near-infrared light curve can beexplained by concentric rings of thin dust within $\sim$0.1 parsecs of a 6e6M$_{\odot}$ supermassive black hole (SMBH), among the smallest scales at whichdust has been inferred near SMBHs. We find dust covering factors of order fc$\leq$ 2%, much lower than found for dusty tori of active galactic nuclei.These results highlight the potential of TDEs for uncovering the environmentsaround black holes when including near-infrared observations in high-cadencetransient studies.

Probing the Sub-Parsec Dust of a Supermassive Black Hole with the Tidal Disruption Event AT 2020mot