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Limits on the Variability of Physical Constants | M. J. Drinkwater
; J. K. Webb
; J. D. Barrow
; V. V. Flambaum
; | Date: |
24 Sep 1997 | Subject: | astro-ph hep-ph | Affiliation: | University of New South Wales, University of Sussex | Abstract: | We have compared the frequency of high-redshift Hydrogen HI 21 cm absorption with that of associated molecular absorption in two quasars to place new (1 sigma) upper limits on any variation in y = g_p.alpha^2 (where alpha is the fine structure constant and g_p is the proton g-factor) of |Delta(y)/y| < 5.10^{-6} at redshifts z=0.25 and z=0.68. | Source: | arXiv, astro-ph/9709227 | Services: | Forum | Review | PDF | Favorites |
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