UBVR
Surface Photometry
of the Late Type Galaxies NGC 523 and NGC 7678
B. P. Artamonov, V. V. Bruevich, and A. S. Gusev
Sternberg Astronomical Institute, Universitetskii pr. 13, Moscow, 119899 Russia
Received October 1, 1996
Abstract—Results
of UBVR surface photometry of the two late type galaxies
NGC 523 and NGC 7678 are presented. The observations were made on
the 1-m telescope at Maidanak Observatory (Uzbekistan) using an
electronic image converter. Regions of star formation in the
galaxies are identified and studied. The composition of the
stellar population in the star-forming regions is estimated using
(U - B)0 - (B - V)0 two-color
diagrams. The mechanisms stimulating star formation in NGC 523
and NGC 7678 are discussed.
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