Probing nontensorial gravitational waves with a next-generation ground-based detector network
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arXiv
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| Natura: | Preprint |
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2023
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| _version_ | 1866929310031413248 |
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| author | Hu, Jierui Liang, Dicong Shao, Lijing |
| author_facet | Hu, Jierui Liang, Dicong Shao, Lijing |
| contents | In General Relativity, there are only two polarizations for gravitational waves. However, up to six polarizations are possible in a generic metric theory of gravity. Therefore, measuring the polarization content of gravitational waves provides an efficient way to test theories of gravity. We analyze the sensitivity of a next-generation ground-based detector network to nontensorial polarizations. We present our method to localize GW signals in the time-frequency domain and construct the model-independent null stream for events with known sky locations. We obtain results based on simulations of binary neutron star mergers in a six-detector network. For a single event at a luminosity distance $D_L=100 \, {\rm Mpc}$, at $5σ$ confidence, the smallest amplitude for detection of scalar and vector modes relative to tensor modes are respectively $A_{s}=0.045 $ and $A_{v}=0.014 $. For multiple events in an averaged observing run of 10 years, the detection limits at $5σ$ confidence are $A_s=0.05$ and $A_v=0.02$. If we are fortunate, a few strong events might significantly improve the limits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_01249 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Probing nontensorial gravitational waves with a next-generation ground-based detector network Hu, Jierui Liang, Dicong Shao, Lijing General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena In General Relativity, there are only two polarizations for gravitational waves. However, up to six polarizations are possible in a generic metric theory of gravity. Therefore, measuring the polarization content of gravitational waves provides an efficient way to test theories of gravity. We analyze the sensitivity of a next-generation ground-based detector network to nontensorial polarizations. We present our method to localize GW signals in the time-frequency domain and construct the model-independent null stream for events with known sky locations. We obtain results based on simulations of binary neutron star mergers in a six-detector network. For a single event at a luminosity distance $D_L=100 \, {\rm Mpc}$, at $5σ$ confidence, the smallest amplitude for detection of scalar and vector modes relative to tensor modes are respectively $A_{s}=0.045 $ and $A_{v}=0.014 $. For multiple events in an averaged observing run of 10 years, the detection limits at $5σ$ confidence are $A_s=0.05$ and $A_v=0.02$. If we are fortunate, a few strong events might significantly improve the limits. |
| title | Probing nontensorial gravitational waves with a next-generation ground-based detector network |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2310.01249 |