6. Conclusions

It is known from the optical data that Kazarian galaxies exhibit large varieties of morphological (Kazarian et al. 1981; Tamazian 1987), spectral (Kazarian et al. 1981; Kazarian & Tamazian 1982, 1993; Kazarian 1987) and photometric (Tamazian 1983; 1984) properties. From this point of view they are rather close to the galaxies from other peculiar lists such as Markarian (Huchra 1977), blue Haro (du Puy 1970) and Kiso ultraviolet-bright objects (Maehara et al. 1987).

More than 80% of these galaxies show strong emission lines of Balmer serie and forbidden lines of [O II], [O III], [N II], [S II] etc. frequently observed in the above mentioned lists of UV-excess galaxies which implies significant gas amounts excited by unusually elevated relative number of hot O, B stars in vast majority of these objects. The present study demonstrate that the same large variety of properties is being observed for non-Seyfert Kazarian galaxies when considering another set of the astrophysical parameters related with their hydrogen content.

We conclude that Kazarian galaxies do not constitute a homogeneous sample by any of the commonly used H I related parameters. It is worth noting that these parameters vary in the same range as those for the classical galaxies. On the other hand, the present study indicates a number of galaxies whose H I properties certainly differ from those for classical normal galaxies, thus showing the peculiar character of a rather high relative number ( $\approx30\%$) of Kazarian objects. Further comparative study of their optical and H I properties would be welcomed to clarify the nature of these peculiarities.

Acknowledgements

The author would like to thank the referee, Prof. L. Bottinelli for valuable comments.

The author has made use of data from Lyon-Meudon Extragalactic Database (LEDA) compiled by the LEDA team at the CRAL-Observatoire de Lyon (France).