A molecular probe of dark energy
Journal article, 2008

Many theoretical models of dark energy invoke rolling scaler fields which in turn predict time varying values of the fundamental constants. Establishing the value of the fundamental constants at various times in the universe can probe and test the various dark energy theories. One of the constants that is predicted to vary is the ratio of the electron to proton mass μ. It was established early on that molecular spectra are sensitive to the value of μ and can be used as probes of that value. This article describes the use of the spectrum of molecular hydrogen in high redshift Damped Lyman Alpha systems (DLAs) as a sensitive probe of the time evolution of μ.


dark energy


Rodger I. Thompson

University of Arizona

Jill Bechtold

University of Arizona

Daniel Eisenstein

University of Arizona

Xiaohui Fan

University of Arizona

David Arnett

University of Arizona

Carlos Martins

University of Cambridge

Universidade do Porto

R.C. Kennicutt

University of Cambridge

John H Black

Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics

Advances in Space Research

0273-1177 (ISSN)

Vol. 42 3 596-598

Subject Categories

Astronomy, Astrophysics and Cosmology



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