The spectral evolution of disc dominated tidal disruption events

Understand

We perform a detailed numerical and analytical study of the properties of observed light curves from relativistic thin discs, focussing on observational bands most appropriate for comparison with tidal disruption events (TDEs).

• We make use of asymptotic expansion techniques applied to the spectral emission integral, using time dependent disc temperature profiles appropriate for solutions of the relativistic thin disc equation.
• Rather than a power law associated with bolometric disc emission $L \sim t^{-n}$, the observed X-ray flux from disc-dominated TDEs will typically have the form of a power law multiplied by an exponential (see eq.
• 91).