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Speaker |
Sotani, Hajime |
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Coauthors |
Kuroda,Takami; Takiwaki, Tomoya; Kotake, Kei |
| Talk Title |
Constraint on the equation of state via supernova gravitational waves |
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Abstract |
The gravitational-wave asteroseismology is a powerful technique for extracting interior information of compact objects. We focus on spacetime modes, the so-called w modes, of GWs emitted from a proto-neutron star (PNS) in the postbounce phase of core-collapse supernovae. Using results from recent three-dimensional supernova models, we find that the w1-mode frequency multiplied by the PNS radius is expressed as a linear function with respect to the compactness of the PNS insensitively to the nuclear equation of state. Combining with another universal relation of the f-mode oscillations, we point out that the time dependent mass-radius relation of the PNS can be obtained by observing both the f- and w1-mode GWs simultaneously. Our results suggest that the simultaneous detection of the two modes could provide a new probe into finite-temperature nuclear EOS that predominantly determines the PNS evolution. |
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