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Does the fine-structure constant vary with cosmic time?

Bahcall, John N. and Schmidt, Maarten (1967) Does the fine-structure constant vary with cosmic time? Physical Review Letters, 19 (22). pp. 1294-1295. ISSN 0031-9007. doi:10.1103/PhysRevLett.19.1294.

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The fine structure constant at red shifts Δλ / λ≈0.2, corresponding to an epoch around two billion years ago, has been determined using the wavelengths of a pair of O III emission lines measured in the spectra of five radio galaxies. We find α(z=0.2) / α(lab)=1.001±0.002 probable error.

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Additional Information:© 1967 The American Physical Society. Received 3 November 1967. The research of one of us (J.N.B.) was supported in part by the National Science Foundation under Grant No. GP-5391, and the U.S. Office of Naval Research under Contract No. Nonr-220(47). [J.N.B. was an] Alfred P. Sloan Fellow.
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Office of Naval Research (ONR)Nonr-220(47)
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:22
Record Number:CaltechAUTHORS:BAHprl67
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12398
Deposited By: Tony Diaz
Deposited On:11 Dec 2008 04:34
Last Modified:08 Nov 2021 22:28

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