11 citations · 12 across the 9 of their papers we have counts for
9 papers
Constraints on mu-variations from the methanol CH3OH thermal lines in the Galaxy at galactocentric distances of 1.5 < D_GC < 13 kpc
A. I. Shtein, J. S. Vorotyntseva, S. A. Levshakov
In this study, constraints are set on hypothetical variations of the fundamental physical constant mu = m_e/m_p - the electron-to-proton mass ratio - based on thermal emission line…
Indications of electron-to-proton mass ratio variations in the Galaxy. III. 0.6mm methanol lines toward SgrB2(N) and Orion-KL
J. S. Vorotyntseva, S. A. Levshakov
In this paper, we show that methanol (CH3OH) torsional-rotational transitions, which have increased sensitivity to small variations of mu - the electron-to-proton mass ratio, are s…
Acetaldehyde as a molecule for testing variations of electron-to-proton mass ratio
J. S. Vorotyntseva, S. A. Levshakov, M. G. Kozlov
We present the quantum-mechanical calculations of the dimensionless sensitivity coefficients Q to small changes in the fundamental physical constant mu = m_e/m_p - the electron-to-…
Indications of electron-to-proton mass ratio variations in the Galaxy. II. 3 mm methanol lines toward Sgr B2(N) and (M)
J. S. Vorotyntseva, S. A. Levshakov, C. Henkel
Differential measurements of the fundamental constant mu = m_e/m_p (the electron-to-proton mass ratio) for two sources near the Galactic Center - the Sgr B2(N) and B2(M) molecular…
Indication of the electron-to-proton mass ratio variation within the Galaxy
J. S. Vorotyntseva, S. A. Levshakov
Near (~100 pc) and far (~8.7 kpc) relative to the Galactic center, the molecular clouds SgrB2(N) and Orion-KL exhibit different values of the fundamental physical constant mu=m_e/m…
Spectroscopic Shifts in Deuterated Methanol Induced by Variation of me/mp
J. S. Vorotyntseva, S. A. Levshakov, M. G. Kozlov
Numerical calculations of the sensitivity coefficients, Q_mu, of microwave molecular transitions in the ground torsion-rotation state of deuterated methanol (CH3OD, CD3OH, and CD3O…
Torsion-rotational transitions in methanol as a probe of fundamental physical constants -- electron and proton masses
J. S. Vorotyntseva, S. A. Levshakov
We report on the using of torsion-rotational transitions in the CH3OH and (13)CH3OH molecules to evaluate possible variations of the physical constant mu=m_e/m_p - the electron-to-…
Hyperfine structure of methanol lines at 25 GHz
J. S. Vorotyntseva, S. A. Levshakov
High-dispersion (channel width 0.015 km s^-1) laboratory spectroscopy of the torsion-rotation lines J_2 - J_1 (J = 2 - 6) in the ground torsional state (vt = 0) of the E-type metha…
Methanol isotopologues as a probe for spatial and temporal variations of the electron-to-proton mass ratio
J. S. Vorotyntseva, M. G. Kozlov, S. A. Levshakov
We present results on numerical calculations of the sensitivity coefficients, Qmu, of microwave molecular transitions in (13C)H3OH and CH3(18O)H to the hypothetical variation in th…