Multimessenger Asteroseismology of Core-Collapse Supernovae

Understand

We investigate correlated gravitational wave and neutrino signals from rotating core-collapse supernovae with simulations.

• Using an improved mode identification procedure based on mode function matching, we show that a linear quadrupolar mode of the core produces a dual imprint on gravitational waves and neutrinos in the early post-bounce phase of the supernova.
• The angular harmonics of the neutrino emission are consistent with the mode energy around the neutrinospheres, which points to a mechanism for the imprint on neutrinos.
• Thus, neutrinos carry information about the mode amplitude in the outer region of the core, whereas gravitational waves probe deeper in.