Spontaneous Scalarization as a New Core-Collapse Supernova Mechanism and its Multi-Messenger Signals
Abstract
We perform multi-dimensional core-collapse supernova (CCSN) simulations in a massive scalar-tensor theory for the first time with a realistic equation of state and multi-energy neutrino radiation. Among the set of our models varying the scalar mass and the coupling strength between the scalar and gravitational fields, a particular model allows for recurrent spontaneous scalarizations (SSs) in the proto-neutron star (PNS). Each SS induces the PNS collapse and subsequent bounce, from which devastating shock waves emanate and eject the PNS envelope. The explosion energy can easily exceed O(1051) erg. This study reveals new aspects of SS as the explosion mechanism of CCSNe. We also discuss its characteristic multi-messenger signals: neutrinos and gravitational waves.
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