Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-14
Astrophys.Space Sci. 283 (2003) 583-588
Astronomy and Astrophysics
Astrophysics
6 pages, 1 figure. Talk presented at the JENAM 2002 Workshop on Varying Fundamental Constants, Porto, 4th September 2002. To b
Scientific paper
10.1023/A:1022522600509
The possible cosmological variation of the proton-to-electron mass ratio was estimated by measuring the H_2 wavelengths in the high-resolution spectrum of the quasar Q~0347-382. Our analysis yielded an estimate for the possible deviation of \mu value in the past, 10 Gyr ago: for the unweighted value $\Delta \mu / \mu = (3.0\pm2.4)\times10^{-5}$; for the weighted value \[ \Delta \mu / \mu = (5.02\pm1.82)\times10^{-5}\] Since the significance of the both results does not exceed 3$\sigma$, further observations are needed to increase the statistical significance. In any case, this result may be considered as the most stringent estimate on an upper limit of a possible variation of \mu (95% C.L.): \[ |\Delta \mu / \mu| < 8\times 10^{-5} \] This value serves as an effective tool for selection of models determining a relation between possible cosmological deviations of the fine-structure constant \alpha and the elementary particle masses (m$_p$, m$_e$, etc.).
Ivanchik Alexander
Petitjean Patrick
Rodríguez Eduardo
Varshalovich Dmitry
No associations
LandOfFree
Does the proton-to-electron mass ratio vary in the course of cosmological evolution? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Does the proton-to-electron mass ratio vary in the course of cosmological evolution?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Does the proton-to-electron mass ratio vary in the course of cosmological evolution? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-411709