A spectral and photometric study of 102 star forming regions in seven
  spiral galaxies
  We present a study of complexes of young massive star clusters (YMCs),
embedded in extragalactic giant HII regions, based on the coupling of
spectroscopic with photometric and spectrophotometric observations of about 100
star forming regions in seven spiral galaxies (NGC 628, NGC 783, NGC 2336, NGC
6217, NGC 6946, NGC 7331, and NGC 7678). The complete observational database
has been observed and accumulated within the framework of our comprehensive
study of extragalactic star forming regions. The current paper presents the
last part of either unpublished or refreshed photometric and spectrophotometric
observations of the galaxies NGC 6217, NGC 6946, NGC 7331, and NGC 7678. We
derive extinctions, chemical abundances, continuum and line emissions of
ionised gas, ages and masses for cluster complexes. We find the young massive
cluster complexes to have ages no greater than 10 Myr and masses between
10^4Msol and 10^7Msol, and the extinctions A(V) vary between ~ 0 and 3 mag,
while the impact of the nebular emission on integrated broadband photometry
mainly is not greater than 40% of the total flux and is comparable with
accuracies of dereddened photometric quantities.We also find evidence of
differential extinction of stellar and gas emissions in some clusters, which
hinders the photometric determination of ages and masses in these cases.
Finally, we show that young massive cluster complexes in the studied galaxies
and open clusters in the Milky Way form a continuous sequence of
luminosities/masses and colour/ages.
