Limits on the Variability of Physical Constants
Astrophysics
2007-05-23 v1 High Energy Physics - Phenomenology
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.
Cite
@article{arxiv.astro-ph/9709227,
title = {Limits on the Variability of Physical Constants},
author = {M. J. Drinkwater and J. K. Webb and J. D. Barrow and V. V. Flambaum},
journal= {arXiv preprint arXiv:astro-ph/9709227},
year = {2007}
}
Comments
To appear in: Structure and Evolution of the IGM from QSO Absorption Line Systems, IAP Colloquium, eds. P. Petitjean and S. Charlot, in press; 2 pages, a LaTeX file and the style file conf_iap.sty