Constraining self-interactions of a massive scalar field using scalar gravitational waves from stellar core collapse
arXiv:2308.15052 · doi:10.1103/PhysRevD.108.044060
Abstract
We perform a comprehensive numerical study of gravitational waves from stellar core collapse in the massive scalar-tensor theory with the cubic and quartic self-interactions of the scalar field. We investigate the dependence of gravitational waves on the self-interaction as well as the mass of the scalar field and the conformal factor. We find that gravitational-wave spectra show a systematic difference between the cubic and quartic self-interactions. We also find that this systematic difference is insensitive to the mass of the scalar field and the conformal factor. Our results indicate that the type of the self-interaction could be constrained by observations of gravitational waves using the future-planned detectors.
arXiv comment16 pages, 16 figures, 1 table
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