Constraining the time variation of Newton's constant G with gravitational-wave standard sirens and supernovae

Zhao, Wen; Wright, Bill S.; Li, Baojiu

Abstract

The intrinsic peak luminosity of Type Ia supernovae (SNIa) depends on the value of Newton's gravitational constant G, through the Chandrasekhar mass MCh∝ G−3/2. If the luminosity distance can be independently determined, the SNIa can be treated as a tracker to constrain the possible time variation of G in different redshift ranges. The gravitational-wave (GW) standard sirens, caused by the coalescence of binary neutron stars, provide a model-independent way to measure the distance of GW events, which can be used to determine the luminosity distances of SNIa by interpolation, provided the GW and SNIa samples have similar redshift ranges. We demonstrate that combining the GW observations of third-generation detectors with SNIa data provides a powerful and model-independent way to measure G in a wide redshift range, which can constrain the ratio G/G0, where G and G0 are respectively the values in the redshift ranges z>0.1 and z<0.1, at the level of 1.5%.

Citation

Zhao, W., Wright, B. S., & Li, B. (2018). Constraining the time variation of Newton's constant G with gravitational-wave standard sirens and supernovae. Journal of Cosmology and Astroparticle Physics, 2018(10), Article 052. https://doi.org/10.1088/1475-7516/2018/10/052

• Journal Article Type: Article
• Acceptance Date: Oct 17, 2018
• Online Publication Date: Oct 29, 2018
• Publication Date: Oct 29, 2018
• Deposit Date: Nov 14, 2018
• Publicly Available Date: Oct 29, 2019
• Journal: Journal of Cosmology and Astroparticle Physics
• Electronic ISSN: 1475-7516
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2018
• Issue: 10
• Article Number: 052
• DOI: https://doi.org/10.1088/1475-7516/2018/10/052
• Public URL: https://durham-repository.worktribe.com/output/1314092
• Related Public URLs: https://arxiv.org/abs/1804.03066