Candidate List of Edge-on Galaxies with Substantial Extraplanar Dust
  We present a list of edge-on galaxies that might have substantial extraplanar
dust. Twenty-three edge-on galaxies were selected as target galaxies from an
edge-on galaxy catalog, and their Galaxy Evolution Explorer far-ultraviolet
images were fitted with three dimensional radiative transfer galaxy model. The
galaxy model is described by two disks: one for the light source and the other
for the dust. The best-fit parameters were found by employing a global
optimization method, called differential evolution. To find the galaxies with
substantial extraplanar dust using the best-fit parameters, we plotted the
ratio of scale-height to galactic diameter: $z_s/D_{25,ph}$ (light source) vs
$z_d/D_{25,ph}$ (dust). We found that 17 and 6 galaxies fall on the region of
$(z_s/D_{25,ph}\times100)>0.2$ and $(z_s/D_{25,ph}\times100)<0.2$,
respectively. The former is named as "high-group" and the latter is named as
"low-group." We conclude that "high-group" is likely to be the galaxies with
substantial extraplanar dust, while "low-group" is likely to be the ones with
little extraplanar dust, i.e. typical galactic thin disk, based on the
following points: (1) the relative positions of "high-group" and "low-group" on
the plot $z_s/D_{25,ph}$ vs $z_d/D_{25,ph}$ with respect to the reference
values from optical radiative transfer studies; (2) the lower scale-height of
the young stellar population than the old stellar population; and (3) a test
result that shows the existence of extraplanar dust makes $z_s$ and $z_d$
overestimated in the fitting results. We also examined the dependence of the
group separation on the surface density of far-ultraviolet luminosity
($L_{FUV}/D^2_{25,ph}$), but found no strong dependence.
