Abstract.A sample of 61 Markarian galaxies detected in the CO line was compiled. Using available HI, H 2 , optical and radio continuum data, the analysis of the gas kinematics and the star formation properties for this sample of galaxies was performed. The main conclusion can be summarized as follows:(1) The HI and CO line widths are well correlated. Interaction between galaxies has no influence on the CO line broadening. A rapidly rotating nuclear disk in the galaxy might lead to the CO line broadening with less influence on the HI line.(2) The atomic and molecular gas surface densities are well correlated with the blue, FIR and radio continuum surface brightness; however, the correlation for molecular component is stronger. (3) In general, the galaxies with UV-excess (Markarian galaxies) do not differ in their star formation properties from the non-UV galaxies.

The properties of OH megamaser galaxies in the radio continuum are discussed. Many radio sources in OH megamaser galaxies exhibit relatively flat ( -0.5 ≥ α ) radio spectra between frequencies of 1.49 and 8.44 GHz along with high brightness temperatures ( 4 10 ≥ b T K). In these galaxies the line and radio continuum fluxes are not correlated. The continuum radio emission of OH megamasers is predominantly nonthermal and is associated either with an active nucleus or with compact star formation. The thermal component of the radio emission from these galaxies can be neglected. The observed flat radio spectra and high brightness temperatures imply the existence of an active galactic nucleus, although some megamasers may be associated with compact star formation.

Abstract.A sample of 9 OH megamaser galaxies detected in the soft X-ray domain was compiled. Using available OH and X-ray data a striking correlation was found between the X-ray luminosity and the width of the OH line. This correlation may indicate that the X-ray heating of a molecular gas may increase the collisional excitation of the maser emission. However, this result should be considered as a tentative one because of the insufficient number of galaxies. An analysis of the saturation states of compact and diffuse components of OH emission was performed. The results of the analysis support the assumption that both the compact and diffuse OH maser emissions in the megamaser galaxies are saturated. The diffuse component might show unsaturated masing under certain conditions, such as the appropriate relation between the intensities of compact and diffuse components and a relevant number of the IR photons to pump the maser emission.