An $H\alpha$ Imaging Survey of the all (Ultra-)Luminous Infrared
  Galaxies at $Dec. \ge -30^{\circ}$ in the GOALS Sample
  This paper presents the result of $H\alpha$ imaging for luminous infrared
galaxies (LIRGs) and ultra-luminous infrared galaxies (ULIRGs). \textbf{It is }
a \textbf{complete subsample of Great Observatories All-sky LIRG Survery
(GOALS) with $Dec. \ge -30^{\circ}$}, \textbf{and} consists 148 galaxies with
$log(L_{IR}/L_{\odot}) \ge 11.0$. All the $H\alpha$ images were carried out
using the 2.16-m telescope \textbf{at the Xinglong Station of the} National
Astronomy Observatories, Chinese Academy of Sciences\textbf{ (NAOC),} during
the year from 2006 to 2009. We obtained pure $H\alpha$ luminosity for each
galaxy and corrected the luminosity for $[NII]$ emission, filter transmission
and extinction. We also classified these galaxies based on their morphology and
interaction. We found that the distribution of star-forming \textbf{regions} in
these galaxies is related to this classification. As the merging process
advanced, these galaxies tend to have a more compact distribution of
star-forming region, higher \textbf{$L_{IR}$} and warmer IR-color
($f_{60}/f_{100}$). \textbf{These} results imply that the degree of dynamical
disturbance plays an important role in determining the distribution of
star-forming region.
