Testing Cosmological Variability of the Proton‐to‐Electron Mass Ratio Using the Spectrum of PKS 0528−250
Open Access
- 1 October 1998
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 505 (2) , 523-528
- https://doi.org/10.1086/306211
Abstract
Multidimensional cosmologies allow for variations of fundamental physical constants over the course of cosmological evolution, and different versions of the theories predict different time dependences. In particular, such variations could manifest themselves as changes of the proton-to-electron mass ratio μ = mp/me over the period of ~1010 yr since the moment of formation of high-redshift QSO spectra. Here we analyze a new high-resolution spectrum of the z = 2.81080 molecular hydrogen absorption system toward the QSO PKS 0528-250 to derive a new observational constraint to the time-averaged variation rate of the proton-to-electron mass ratio. We find | /μ |−14 yr-1, which is much tighter than previously measured limits.Keywords
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This publication has 21 references indexed in Scilit:
- Astrophysical Limits on the Evolution of Dimensionless Physical Constants over Cosmological TimeThe Astrophysical Journal, 1995
- The string dilation and a least coupling principleNuclear Physics B, 1994
- Molecules at early epochs. IV - Confirmation of the detection of H2 toward PKS 0528 - 250The Astrophysical Journal, 1988
- Observational limits on the time evolution of extra spatial dimensionsPhysical Review D, 1987
- Time variation of fundamental constants, primordial nucleosynthesis, and the size of extra dimensionsPhysical Review D, 1986
- Kaluza-Klein cosmologiesNuclear Physics B, 1982
- Where has the fifth dimension gone?Physical Review D, 1980
- Molecular Spectra and Molecular StructurePublished by Springer Nature ,1979
- Electricity, Gravity, and CosmologyPhysical Review Letters, 1967
- The Cosmological ConstantsNature, 1937