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A new constraint on cosmological variability of the proton-to-electron mass ratio | | S. A. Levshakov
; M. Dessauges-Zavadsky
; S. D’Odorico
; P. Molaro
; | | Date: |
12 Jun 2001 | | Journal: | Mon.Not.Roy.Astron.Soc. 333 (2002) 373 | | Subject: | astro-ph | | Affiliation: | NAOJ, Mitaka, Tokyo; ESO, Garching, Germany; Osservatorio Astronomico di Trieste, Italy | | Abstract: | Exotic cosmologies predict variability of the fundamental physical constants over the cosmic time. Using the VLT/UVES high resolution spectra of the quasar Q0347-3819 and unblended electronic - vibrational - rotational lines of the H2 molecule identified at z = 3.025 we test possible changes in the proton - to - electron mass ratio mu_0 = m_p/m_e over the period of 11 Gyr. We obtained a new constraint on the time - averaged variation rate of mu_0 of |d mu /d t /mu_0| < 5 10^{-15} yr^{-1} (1 sigma c.l.). The estimated 1 sigma uncertainty interval of the |Delta mu/mu_0| ratio of about 0.004% implies that since the time when the H2 spectrum was formed at z = 3.025, mu_0 has not changed by more than a few thousands of a percent. | | Source: | arXiv, astro-ph/0106194 | | Services: | Forum | Review | PDF | Favorites | |
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