Sensitivity of microwave and FIR spectra to variation of fundamental constants

Details Sensitivity of microwave and FIR spectra to variation of fundamental constants Sensitivity of microwave and FIR spectra to variation of fundamental constants

2009-10-26

arxiv.org/abs/0910.4799v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

IAU 2009 JD9 conference proceedings. 4 pages, 3 figures. MmSAI, vol. 80 in press, eds. Paolo Molaro & Elisabeth Vangioni

Scientific paper

We estimate sensitivity coefficients to variation of the fine-structure constant alpha and electron-to-proton mass ratio mu for microwave Lambda-type transitions in CH molecule and for inversion-rotational transitions in partly deuterated ammonia NH2D. Sensitivity coefficients for these systems are large and strongly depend on the quantum numbers of the transition. This can be used for the search for possible variation of alpha and mu.

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