Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2018/10/052
Keywords
gravitational waves; theory, modified gravity
Funding
- NSFC [11773028, 11653002, 11633001]
- UK Science and Technology Facilities Council (STFC) research studentship
- European Research Council [ERC-StG-716532-PUNCA]
- STFC [ST/P000541/1]
- STFC [ST/P000541/1, 1825588] Funding Source: UKRI
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The intrinsic peak luminosity of Type Ia supernovae (SNIa) depends on the value of Newton's gravitational constant G, through the Chandrasekhar mass M-Ch proportional to 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/G 0, where G and G 0 are respectively the values in the redshift ranges z > 0.1 and z < 0.1, at the level of 1.5%.
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