Multimessenger Asteroseismology of Core-Collapse Supernovae

We identify the proto-neutron star mode responsible for imprint on both gravitational waves and neutrinos in simulations using an eigenfunction matching procedure. This procedure reveals an unphysical enhancement of mode frequencies in pseudo-Newtonian simulations. We find evidence that the mechanism of imprint on neutrinos is via direct hydrodynamic modulation of the neutrinospheres.