Detailed predictions via ray tracing of GRMHD simulations
In this line of research, we take data from detailed GRMHD simulations of equal-mass supermassive black holes at close separations (Bowen et al. 2019, Combi et al. 2021), and we post-process the data with the ray-tracing code Bothros, in a continuation of the work done by d'Ascoli et al. (2018). The black holes are fed by two minidisks, which in turn are fed by a circumbinary disk via two streams. In the movie on the right, you can see a far-UV ray-traced movie of the system, next to its Spectral Energy Distribution (SED). The various components of the binary: circumbinary disk, minidisks, streams, and cavity, are shown in different colors and linestyles.
For more details, you can check my talk at the LISA Astrophysics Working Group meeting.