Morphology and environment of galaxies with disc breaks in the S4G and
  NIRS0S
  We study the surface brightness profiles of disc galaxies in the 3.6 micron
images from the Spitzer Survey of Stellar Structure in Galaxies (S4G) and
K_s-band images from the Near Infrared S0-Sa galaxy Survey (NIRS0S). We
particularly connect properties of single exponential (type I), downbending
double exponential (type II), and upbending double exponential (type III) disc
profile types, to structural components of galaxies by using detailed
morphological classifications, and size measurements of rings and lenses. We
also study how the local environment of the galaxies affects the profile types
by calculating parameters describing the environmental density and the tidal
interaction strength. We find that in majority of type II profiles the break
radius is connected with structural components such as rings, lenses, and
spirals. The exponential disc sections of all three profile types, when
considered separately, follow the disc scaling relations. However, the outer
discs of type II, and the inner discs of type III, are similar in scalelength
to the single exponential discs. Although the different profile types have
similar mean environmental parameters, the scalelengths of the type III
profiles show a positive correlation with the tidal interaction strength.
