Title:
Non-thermal emission from TDEs: New insights from ALMA

Abstract:
A tidal disruption event (TDE) may temporarily increase 
the accretion rate onto a supermassive black hole (SMBH) 
by orders of magnitude, providing a valuable opportunity to test 
theories of super-Eddington accretion and to study the formation and 
growth of relativistic jets and and outflows. These jets generate 
non-thermal synchrotron emission, which is best observed in 
the radio and millimeter bands. Radio observations of TDEs allow us 
to precisely localize the emission (confirming its TDE origin), 
to determine the properties of outflowing material (energy, size, expansion velocity), 
and to trace the ambient density profile around previously-dormant SMBHs 
on otherwise unresolvable scales of ~0.1 - 10 pc. 
Despite increasingly intensive radio follow up of TDEs in recent years, 
the sample of radio-detected TDEs remains small, 
revealing an unexpectedly diverse population. 
I will present updated constraints on the weakest outflows in TDEs, 
including the first millimeter observations of TDEs undertaken with ALMA. 
The increased sample size now being realized by 
newly upgraded wide-field optical surveys will shed further light on 
the physical conditions required for jet and outflow formation in TDEs.