Title:
Composition in TDEs using FLASH+MESA

Abstract:
The increasing richness of observed TDE spectral features, 
coupled with hydrodynamical simulations of the elemental composition of the debris, 
is the key to determining the nature of the disrupted star. 
In addition to being a unique probe of galactic nuclear stellar populations, 
characterizing the mass and age of the disrupted star lifts a central degeneracy 
and thus allows fitting routines such as MOSFIT to better determine all of 
the other properties of the disruption, including the BH’s mass and spin, 
the photosphere radius, and the radiative efficiency.

I will present the complete FMTDE (=FLASH+MESA) simulation library 
in which we track 50 chemical elements, use realistic stellar structures, 
and use a Helmholtz EOS for TDEs of a grid of stellar masses, ages, 
and impact parameters. The mass fallback rates and elemental abundances vs. 
time from the FMTDE library will be publicly released.

I will also present new work using the FMTDE framework to model TDE disk formation 
and disk compositional structure. These simulations produce abundance gradients 
for TDE disks, which is an important step in constructing a predictive model for 
the light curves and spectral features of TDEs that links hydrodynamical simulations 
and radiative transfer calculations.