Ground-based Pa$\alpha$ Narrow-band Imaging of Local Luminous Infrared
  Galaxies II: Bulge Structure And Star Formation Activity
  We present properties of two types of bulges (classical- and pseudo- bulges)
in 20 luminous infrared galaxies (LIRGs) observed in the near infrared of the
$H$, $K_s$ and 1.91$\mu$m narrow-band targeting at the hydrogen Pa$\alpha$
emission line by the University of Tokyo Atacama Observatory (TAO) 1.0 m
telescope. To classify the two types of bulges, we first perform a
two-dimensional bulge-disk decomposition analysis in the $K_\mathrm{s}$-band
images. The result shows a tentative bimodal distribution of S\'ersic indices
with a separation at $\log(n_b)\sim0.5$, which is consistent with that of
classical and normal galaxies. We next measure extents of the distribution of
star forming regions in Pa$\alpha$ emission line images, normalized with the
size of the bulges, and find that they decrease with increasing S\'ersic
indices. These results suggest that star-forming galaxies with classical bulges
have compact star forming regions concentrated within the bulges, while those
with pseudobulges have extended star forming regions beyond the bulges,
suggesting that there are different formation scenarios at work in classical
and pseudobulges.
