New Method of Searching for Cosmological Time Variation of the Fine-Structure Constant

Details New Method of Searching for Cosmological Time Variation of the Fine-Structure Constant New Method of Searching for Cosmological Time Variation of the Fine-Structure Constant

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011pthph.126..177l&link_type=abstract

Progress of Theoretical Physics, Vol. 126, No. 1, pp. 177-184

Physics

Scientific paper

Observed spectra of quasars are affected by the variance of the fine-structure constant α = {e^2}/{4π ɛ_0 hbar c}). We propose a new method of using QSO spectra to investigate the possible temporal or spatial dependence of the fine-structure constant. Making use of the technique to reanalyze the optical spectra of the fine-structure transitions in [Ne III], [Ne V], [O III], [O I] and [S II] multiplets from 14 Seyfert 1.5 galaxies in the low-z range 0.035 < z < 0.281, we obtain a conservative value of α^2(t)/α^2(0) = 0.9999099 ± 0.0000553. This result represents a factor of ˜ 33.4 improvements on the constraint on α^2(t)/α^2(0) compared with the result using the same data published in the literature.

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