摘要：Context.Absorption lines of H2and HD molecules observed at high redshift in the line of sight towards quasars are a test ground to search for variation of the proton-to-electron mass ratioμ. For this purpose, results from astronomical observations are compared with a compilation of molecular data of the highest accuracy, obtained in laboratory studies as well as in first-principles calculations.Aims.A comprehensive line list is compiled for H2and HD absorption lines in the Lyman (B1Σu+−X1Σg+) and Werner (C1Πu−X1Σg+) band systems up to the Lyman cutoff at 912 Å. Molecular parameters listed for each lineiare the transition wavelengthλi, the line oscillator strengthfi, the radiative damping parameter of the excited state Γi, and the sensitivity coefficientKifor a variation of the proton-to-electron mass ratio.Methods.The transition wavelengthsλifor the H2and HD molecules are determined by a variety of advanced high-precision spectroscopic experiments involving narrowband vacuum ultraviolet lasers, Fourier-transform spectrometers, and synchrotron radiation sources. Results for the line oscillator strengthsfi, damping parameters Γi, and sensitivity coefficientsKiare obtained in theoretical quantum chemical calculations.Results.A new list of molecular data is compiled for future analyses of cold clouds of hydrogen absorbers, specifically for studies ofμ-variation from quasar data. The list is applied in a refit of quasar absorption spectra of B0642–5038 and J1237+0647 yielding constraints on a variation of the proton-to-electron mass ratio Δμ/μconsistent with previous analyses.
