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Generic Gravitational Wave Signals from the Collapse of Rotating Stellar Cores

Harald Dimmelmeier·Christian D. Ott·Hans-Thomas Janka·Andreas Marek·Ewald Mueller
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Abstract

We perform general relativistic simulations of stellar core collapse to a proto-neutron star, using a microphysical equation of state as well as an approximate description of deleptonization. We show that for a wide variety of rotation rates and profiles the gravitational wave burst signals from the core bounce are of a generic type, known as Type I in the literature. In our systematic study, using both general relativity and Newtonian gravity, we identify and individually quantify the micro- and macrophysical mechanisms leading to this result, i.e. the effects of rotation, the equation of state, and deleptonization. Such a generic type of signal templates will likely facilitate a more efficient search in current and future gravitational wave detectors of both interferometric and resonant type.

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Harald Dimmelmeier, Christian D. Ott, Hans-Thomas Janka, Andreas Marek, Ewald Mueller. 2007-06-12. Generic Gravitational Wave Signals from the Collapse of Rotating Stellar Cores. https://doi.org/10.1103/physrevlett.98.251101

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