12-16 October 2015
Hungarian Academy of Sciences
Europe/Budapest timezone

The use of precise molecular line spectroscopy in a search for m_e/m_p variations

Oct 13, 2015, 5:45 PM
Kis terem (Small conference room) (Hungarian Academy of Sciences)

Kis terem (Small conference room)

Hungarian Academy of Sciences

1051 Budapest, Széchenyi tér 9.


Dr Alexander Lapinov (Institute of Applied Physics of the RAS)


We report results of precise laboratory spectroscopy for a set of astropysically important species carried out at the Institute of Applied Physics of the RAS over the last years. The investigations are based on Lamb-dip measurements at mm$-$sub-mm wavelengths with the developed sub-Doppler spectrometer. In particular, from a comparison of precise radio astronomical and laboratory frequencies of CH$_3$OH lines we estimate the upper limit on the possible $m_e/m_p$ variation in dark interstellar clouds as $\le1.5\times10^{-8}$.

Primary author

Dr Alexander Lapinov (Institute of Applied Physics of the RAS)


Dr Guerman Golubiatnikov (Institute of Applied Physics of the RAS)

Presentation materials