Speaker
Description
The outer-most marginally-outer trapped surface (MOTS) is often used as a quasi-local boundary of a black hole — the apparent horizon. During a black hole merger, the original two apparent horizons ultimately becoming one involves considerations of MOTSs at each time-slice, and strikingly reveals key involvement of self-intersecting MOTSs. Self-intersecting MOTSs have then been numerically found in static (Schwarzschild, Reissner-Nordstrom, 4D Gauss-Bonnet) and stationary (Kerr) black hole interiors, with their analysis grounded in the Anderson-Simon-Mars stability operator.
This talk will review this self-intersecting MOTS program and showcase work done in asymptotically AdS and dS black hole spacetimes. In Schwarzschild-AdS, the interior MOTSs become more `unstable' as the black hole becomes large, going against previously seen interior MOTS stability behavior.