Are (pseudo)bulges in isolated galaxies actually primordial relics?
  We present structural parameters and (g-i) bulge/disk colors for a large
sample (189) of isolated AMIGA galaxies. The structural parameters of bulges
were derived from the 2D bulge/disk/bar decomposition of SDSS i-band images
using GALFIT. Galaxies were separated between classical bulges (n_b>2.5) and
pseudobulges (n_b<2.5), resulting in a dominant pseudobulge population (94%)
with only 12 classical bulges. In the <mu_e>-Re plane, pseudobulges are
distributed below the elliptical relation (smaller Re and fainter mu_e), with
the closest region to the Kormendy relation populated by those pseudobulges
with larger values of B/T. We derived (g-i) bulge colors using aperture
photometry and find that pseudobulges show median colors (g-i)b~1.06, while
their associated disks are much bluer, (g-i)d~0.77. Moreover, 64% (113/177) of
pseudobulges follow the red sequence of early-type galaxies. Bluer pseudobulges
tend to be located in galaxies with the highest likelihood of tidal
perturbation. The red bulge colors and low B/T values for AMIGA isolated
galaxies are consistent with an early formation epoch and not much subsequent
growth. Properties of bulges in isolated galaxies contrast with a picture where
pseudobulges grow continuosly via star formation. They also suggest that
environment could be playing a role in rejuvenating the pseudobulges.
