AT 2020wey and the class of faint and fast tidal disruption events

We present an analysis of the optical and UV properties AT 2020wey, a faint fast tidal disruption event (TDE) at 124.3 Mpc. The light curve object peaked absolute magnitude $M_{g} = -17.45$ mag maximum bolometric luminosity $L_{\rm peak}=(8.74\pm0.69)\times10^{42}$ erg s$^{-1}$, making it comparably with iPTF16fnl, faintest TDE to date. time from last non-detection $g$-band peak is 22.94 $\pm$ 2.03 days rise well described by $L\propto t^{1.8}$. decline sharp exponential decay steeper than canonical $t^{-5/3}$ power law, 2020wey fastest declining Multi-wavelength fits indicate complete star $M_*=0.11M_{\odot}$ black hole $M_{\rm BH}=10^{6.46}M_{\odot}$. Our spectroscopic dataset reveals broad ($\sim10^{4}$ km s$^{-1}$) Balmer He II $\lambda$4686 lines, H$\alpha$ reaching its lag $\sim8.2$ compared continuum. In contrast previous TDEs, there are no obvious Bowen fluorescence lines in spectra 2020wey. There strong correlation between MOSFIT-derived masses TDEs their rate. However, outlier this correlation, which could that early may be dictated different physical mechanism fallback. After performing volumetric correction sample 30 observed 2018 2020, we conclude not rare nature they should constitute up $\sim$ 50 - 60 % entire population numbers alleviate some tension theoretical rate estimates. calculate function find steep power-law relation $dN/dL_{g} \propto {L_{g}}^{-2.36}$.