Title:
A relativistic disc model of Tidal Disruption Events

Abstract:
An encounter between a passing star and a supermassive blackhole at 
the centre of a galaxy, a so-called tidal disruption event or TDE, 
may leave a debris disc that subsequently accretes onto the blackhole. 
These events and the subsequent evolution of their X-ray light curves 
comprise a particularly interesting application of relativistic disc theory. 
In this talk I will use a 1D disc evolution equation which is valid in the full Kerr geometry. 
The solutions of this equation can be analysed using modal techniques 
which are similar to those used to analyse the standard Newtonian evolution equation. 
I will summarise the properties of these solutions, drawing particular attention to 
the importance of the nature of the ISCO stress, which affects 
the global properties of the time dependent disc solutions. 
As a direct application of this theory I present fits to the evolving FUV and 
X-ray light curves of the particularly well observed TDE ASASSN-14li. 
This model provides a significantly better fit to the observed X-ray light curve of ASASSN-14li when compared to other models in the literature, 
while simultaneously fitting the late time (t > 300 days) FUV emission. 
The time-dependence of the evolving X-ray light curve can be understood with 
analytical techniques. I present a simple formula which describes 
the ASASSN-14li X-ray light curve extremely well and will be of general use for 
fitting to future TDE observations.