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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Accesso online: | https://arxiv.org/abs/2408.05825 |
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| _version_ | 1866917746332139520 |
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| author | Mahmoudi, S. Hendi, S. H. |
| author_facet | Mahmoudi, S. Hendi, S. H. |
| contents | This paper investigates the generation and properties of
gravitational radiation within the framework of Generalized
Brans-Dicke (GBD) theory, with a specific emphasis on its
manifestation in compact binary systems. The primary focus of this study lies in the
comprehensive exploration of gravitational radiation generated by
compact binaries. The energy momentum tensor and the associated
gravitational wave (GW) radiation power in GBD theory are
investigated, elucidating the relationship between these
fundamental concepts. Furthermore, detailed calculations are
provided for the GW radiation power originating from both tensor
fields and scalar fields. Based on our calculations, both scalar
fields contribute to GW radiation by producing dipole radiation.
We also study the period derivative of compact binaries in this
theory. By comparing with the observational data of the orbital
period derivative of the quasicircular white dwarf-neutron star
binary PSR J1012+5307, we put bounds on the two parameters of the
theory: the Brans-Dicke coupling parameter $ω_{0}$ and the
mass of geometrical scalar field $m_f$, \textcolor{black}{resulting
in a lower bound $ω_{0}>6.09723\times10^6$ for a massless BD
scalar field and the geometrical field whose mass is smaller than
$10^{-29} \text{GeV}$. The obtained bound on $ω_0$ is two
orders of magnitude stricter than those derived from solar system
data.} Finally, we find the phase shift that GWs experience in the
frequency domain during their propagation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_05825 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gravitational Radiation in Generalized Brans Dicke Theory: Compact Binary Systems Mahmoudi, S. Hendi, S. H. General Relativity and Quantum Cosmology High Energy Physics - Phenomenology This paper investigates the generation and properties of gravitational radiation within the framework of Generalized Brans-Dicke (GBD) theory, with a specific emphasis on its manifestation in compact binary systems. The primary focus of this study lies in the comprehensive exploration of gravitational radiation generated by compact binaries. The energy momentum tensor and the associated gravitational wave (GW) radiation power in GBD theory are investigated, elucidating the relationship between these fundamental concepts. Furthermore, detailed calculations are provided for the GW radiation power originating from both tensor fields and scalar fields. Based on our calculations, both scalar fields contribute to GW radiation by producing dipole radiation. We also study the period derivative of compact binaries in this theory. By comparing with the observational data of the orbital period derivative of the quasicircular white dwarf-neutron star binary PSR J1012+5307, we put bounds on the two parameters of the theory: the Brans-Dicke coupling parameter $ω_{0}$ and the mass of geometrical scalar field $m_f$, \textcolor{black}{resulting in a lower bound $ω_{0}>6.09723\times10^6$ for a massless BD scalar field and the geometrical field whose mass is smaller than $10^{-29} \text{GeV}$. The obtained bound on $ω_0$ is two orders of magnitude stricter than those derived from solar system data.} Finally, we find the phase shift that GWs experience in the frequency domain during their propagation. |
| title | Gravitational Radiation in Generalized Brans Dicke Theory: Compact Binary Systems |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2408.05825 |