Early type galaxies with tidal debris and their scaling relations in the
  Spitzer Survey of Stellar Structure in Galaxies (S4G)
  Tidal debris around galaxies can yield important clues on their evolution. We
have identified tidal debris in 11 early type galaxies (T \leq 0) from a sample
of 65 early types drawn from the Spitzer Survey of Stellar Structure in
Galaxies (S4G). The tidal debris includes features such as shells, ripples and
tidal tails. A variety of techniques, including two-dimensional decomposition
of galactic structures, was used to quantify the residual tidal features. The
tidal debris contributes ~3 - 10% to the total 3.6 {\mu}m luminosity of the
host galaxy. Structural parameters of the galaxies were estimated using
two-dimensional profile fitting. We investigate the locations of galaxies with
tidal debris in the Fundamental Plane and Kormendy relation. We find that
galaxies with tidal debris lie within the scatter of early type galaxies
without tidal features. Assuming that the tidal debris is indicative of recent
gravitational interaction or merger, this suggests that these galaxies have
either undergone minor merging events so that the overall structural properties
of the galaxies are not significantly altered, or they have undergone a major
merging events but already have experienced sufficient relaxation and
phase-mixing so that their structural properties become similar to those of the
non-interacting early type galaxies.
