Astronomical constraints on the cosmic evolution of the fine structure constant and possible quantum dimensions

Astronomical constraints on the cosmic evolution of the fine structure constant and possible quantum dimensions

We present measurements of absorption by the 21 cm hyperfine transition of neutral hydrogen toward radio sources at substantial look-back times. These data are used in combination with observations of rotational transitions of common interstellar molecules to set limits on the evolution of the fine...

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Veröffentlicht in:Physical review letters 2000-12, Vol.85 (26 Pt 1), p.5511-5514
Hauptverfasser: Carilli, C L, Menten, K M, Stocke, J T, Perlman, E, Vermeulen, R, Briggs, F, de Bruyn, A G, Conway, J, Moore, C P
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Sprache:eng
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Zusammenfassung:We present measurements of absorption by the 21 cm hyperfine transition of neutral hydrogen toward radio sources at substantial look-back times. These data are used in combination with observations of rotational transitions of common interstellar molecules to set limits on the evolution of the fine structure constant: alpha/ alpha
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.85.5511