Poster Presentation

Updated constraints on variations of the fine-structure constant using absorption line multiplets in the early universe

Author(s): T D Le ( Institute for Computational Science)

Presenter: Le Duc thong (Institute for Computational Science)

A new stringent limit on the variation of the fine-structure constant, alpha, have been obtained from Ritz wavelengths of 27 QSOs absorption spectra lines of FeII. The calculation was combined with laboratory wavelengths and QSOs spectra to obtain the result delta alpha/alpha = (0.0706+-0.3..)X10^-6. This result suggests how dedicated astrophysical measurements can improve these constraints further and can also constrain space-time variation of the delta alpha/alpha.