Spectrophotometrical investigation of the NGC 3359 galaxy

Results of detailed spectrophotometrical investigations of NGC 3353, carried out with 6 m telescope of SAO Academy of Sciences of the USSR are presented (dispersion approximately 65 A/mm). Four separate condensations, the brightest of which is Mark 35, are studied. In the spectrum of Mark 35 the emission lines for Hsub(α) to H12, HeI lambda lambda 7065, 6678, 5876, 4922, 4472, 3820 and forbidden lines [01]lambda lambdas 6300/64, [02] lambda 3727, [03] lambda lambda 5007, 4959, 4363, [Ne3] lambda 3869, [N2] lambda lambda 6584/48, [S2] lambda lambda 6717/31, [S3] lambda 6310, [Ar3] lambda 7136 are detected. In the second central condensation, called ''nucleus'', emission lines are weaker and beginning with Hsub(β) the absorption components appear which become stronger in the late members of Balmer lines. The forbidden lines in the nucleus are strong: [Ne3], [O3], [O2], [S2][N2]. The relative intensities and equivalent widths of emission lines as well as the chemical composition of Mark 35 and ''nucleus'' are estimated. Both condensations according to their physical properties look like superassociations. It has been concluded that the source of excitation are young stars. NGC 3353 is probably the net of superassociations