60 citations · 139 across the 6 of their papers we have counts for
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Testing the variability of the proton-to-electron mass ratio from observations of methanol in the dark cloud core L1498
M. Daprà, C. Henkel, S. A. Levshakov +6
The dependence of the proton-to-electron mass ratio, mu, on the local matter density was investigated using methanol emission in the dense dark cloud core L1498. Towards two differ…
Searching for Chameleon-like Scalar Fields
S. A. Levshakov, P. Molaro, M. G. Kozlov +5
Using the 32-m Medicina, 45-m Nobeyama, and 100-m Effelsberg telescopes we found a statistically significant velocity offset Delta V = 27 +/- 3 m/s (1sigma) between the inversion t…
Searching for chameleon-like scalar fields with the ammonia method. II. Mapping of cold molecular cores in NH3 and HC3N lines
S. A. Levshakov, A. V. Lapinov, C. Henkel +4
(Abridged) In our previous work we found a statistically significant offset Delta V = 27 m/s between the radial velocities of the HC3N(2-1) and NH3(1,1) transitions observed in mol…
Searching for chameleon-like scalar fields with the ammonia method
S. A. Levshakov, P. Molaro, A. V. Lapinov +3
(Abridged) The ammonia method, which has been proposed to explore the electron-to-proton mass ratio, mu = m_e/m_p, is applied to nearby dark clouds in the Milky Way. This ratio, wh…
Sensitivity of microwave and FIR spectra to variation of fundamental constants
M. G. Kozlov, A. V. Lapinov, S. A. Levshakov
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…