SPECTRAL INVESTIGATION OF NGC-7469 USING IMAGE-TUBE OBSERVATIONS IN 1972-1990

The present investigation is mainly related to hydrogen lines in a spe ctrum of NGC 7469 using the data obtained with an image tube at the 2. 6-m telescope of the Crimean Astrophysical Observatory in 1972 - 1990. Decomposition of hydrogen lines to broad and narrow components is per formed. Variations of intensities as well of broad-component contours were observed. One third of spectrograms have shown a symmetric broad H(alpha) line, the others have revealed its asymmetry: blue wings fall steeper than red ones. The asymmetry degree is variable, but no corre lation between asymmetry and nucleus brightness is found. The asymmetr y becomes weaker when passing to higher members of the Balmer series. The halfwidths of broad components increase from H(alpha) to H(gamma) Redshifts of broad components with respect to narrow ones perhaps is l arger also when dealing with higher members of the Balmer series. An i ntensity of broad hydrogen lines varies after continuum variations wit h a delay of about 28 days. The Balmer decrement for broad lines is mu ch flatter than narrow ones. These results may be accepted if one agre es that an effective radiation in the broad hydrogen lines emits from denser parts of Broad-Line Region (BLR) with n(e) greater-than-or-equa l-to 10(11) cm-3 and if high-density clouds are situated closer to cen tral engines than low-density ones which are situated near a periphery of regions emitting broad hydrogen lines.