| Autor: |
Huang, Da, Geng, Chao-Qiang, Kuan, Hao-Jui |
| Předmět: |
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| Zdroj: |
Classical & Quantum Gravity; 12/16/2021, Vol. 38 Issue 24, p1-17, 17p |
| Abstrakt: |
The spontaneous scalarization during the stellar core collapse in the massive scalarâ€"tensor theories of gravity introduces extra polarizations (on top of the plus and cross modes) in gravitational waves, whose amplitudes are determined by several model parameters. Observations of such scalarization-induced gravitational waveforms therefore offer valuable probes into these theories of gravity. Considering a triple-scalar interactions in such theories, we find that the self-coupling effects suppress the magnitude of the scalarization and thus reduce the amplitude of the associated gravitational wave signals. In addition, the self-interacting effects in the gravitational waveform are shown to be negligible due to the dispersion throughout the astrophysically distant propagation. As a consequence, the gravitational waves observed on the Earth feature the characteristic inverse-chirp pattern. Although not with the on-going ground-based detectors, we illustrate that the scalarization-induced gravitational waves may be detectable at a signal-to-noise ratio level of O (100) with future detectors, such as Einstein Telescope and Cosmic Explorer. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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