NEW INFRARED SEYFERT-GALAXIES

We present optical spectra for new infrared Seyfert galaxies obtained with the 2.16m telescope at Beijing Astronomical Observatory (BAG). Af ter wavelength and flux calibration, they are classified by the degree of nuclear activity: nine Seyfert 2 and three Seyfert 3 galaxies. In addition, by using the data from de Grijp et al.(1992), we find that ( 1) there exists a tight correlation between luminosities of far-infrar ed (L(FIR)) and H alpha (L(Ha)) for both Seyfert and HII-like (starbur st) galaxies; (2) the median value of H alpha luminosities of Seyfert Is is one magnitude larger than that of Seyfert 2s and starburst galax ies; (3) the cumulative distributions of FIR luminosities and infrared spectral index alpha(100, 60) for Seyfert Is and 2s are similar to th at of starburst galaxies. We conclude that most of the far-infrared em ission from Seyfert 2 galaxies is due to the violent nuclear/circumnuc lear starburst, rather than the nonthermal activity in the nucleus, th is may also be the case for many Seyfert 1s as well.