Far-ultraviolet study of the local supershell GSH 006-15+7
  We have analyzed the archival data of FUV observations for the region of GSH
006-15+7, a large shell-like structure discovered by Moss et al. (2012) from
the H I velocity maps. FUV emission is seen to be enhanced in the lower
supershell region. The FUV emission is considered to come mainly from the
scattering of interstellar photons by dust grains. A corresponding Monte Carlo
simulation indicates that the distance to the supershell is 1300 +- 800 pc,
which is similar to the previous estimation of 1500 +- 500 pc based on
kinematic considerations. The spectrum at lower Galactic latitudes of the
supershell exhibits molecular hydrogen fluorescence lines; a simulation model
for this candidate photodissociation region (PDR) yields an H_2 column density
of N(H_2) = 10^{18.0-20.0} cm^{-2} with a rather high total hydrogen density of
n_H ~ 30 cm^{-3}.
