Abstract
The IR emission of 640 Markarian galaxies (MrkG), included in the IRAS Survey, is considered as an evidence for enhanced star formation rate (SFR) in these objects. About 73% of the MrkG have high far-infrared luminosities (ca. 10E + 44 erg s−1) in 1–500 mcm IR spectral band. The distribution of log(f60/f100), peaked at about 45 K, shows that IRAS MrkGs have a tendency to extend the relationf60/f100 vsLir/Lbifor ‘normal’ S glaxies. They emit up to hundred times more IR energy in 40–120 mcm band than in optics. The mean ratio log 〈Lir/Lb〉 for 621 IRAS MrkG with known redshifts is 2.2.
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