An investigation of a varying G through Strong Lensing and SNe Ia observations
In this paper, we analyze the potential variation of the gravitational constant G using data from strong gravitational lensing systems and Type Ia supernovae. Testing G(z) parameterizations where G(z)=G0(1+G1z) and G(z)=G0(1+z)G1, we also account for the influence of G on the luminosity of SNe Ia th...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325005179 |
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| Summary: | In this paper, we analyze the potential variation of the gravitational constant G using data from strong gravitational lensing systems and Type Ia supernovae. Testing G(z) parameterizations where G(z)=G0(1+G1z) and G(z)=G0(1+z)G1, we also account for the influence of G on the luminosity of SNe Ia through the Chandrasekhar mass-luminosity relation. Only the flat universe hypothesis is considered. Constraints from 158 lensing systems and the Pantheon+ sample show no significant evidence of G variation. However, although the results are compatible with no variation, the errors are not yet sufficiently restrictive to rule out any variation of G with high statistical confidence. This study highlights the viability of using combined astrophysical data to probe variations in fundamental constants, suggesting that future surveys could refine these constraints. |
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| ISSN: | 0370-2693 |