A comprehensive search for stellar bowshock nebulae in the Milky Way: a
  catalog of 709 mid-infrared selected candidates
  We identify 709 arc-shaped mid-infrared nebula in 24 micron Spitzer Space
Telescope or 22 micron Wide Field Infrared Explorer surveys of the Galactic
Plane as probable dusty interstellar bowshocks powered by early-type stars.
About 20% are visible at 8 microns or shorter mid-infrared wavelengths as well.
The vast majority (660) have no previous identification in the literature.
These extended infrared sources are strongly concentrated near Galactic
mid-Plane with an angular scale height of ~0.6 degrees. All host a
symmetrically placed star implicated as the source of a stellar wind sweeping
up interstellar material. These are candidate "runaway" stars potentially
having high velocities in the reference frame of the local medium. Among the
286 objects with measured proper motions, we find an unambiguous excess having
velocity vectors aligned with the infrared morphology --- kinematic evidence
that many of these are "runaway" stars with large peculiar motions responsible
for the bowshock signature. We discuss a population of "in-situ" bowshocks (103
objects) that face giant HII regions where the relative motions between the
star and ISM may be caused by bulk outflows from an overpressured bubble. We
also identify 58 objects that face 8 micron bright-rimmed clouds and apparently
constitute a sub-class of in-situ bowshocks where the stellar wind interacts
with a photo-evaporative flow from an eroding molecular cloud interface (i.e.,
"PEF bowshocks"). Orientations of the arcuate nebulae exhibit a correlation
over small angular scales, indicating that external influences such as HII
regions are responsible for producing some bowshock nebulae. However, the vast
majority of this sample appear to be isolated (499 objects) from obvious
external influences.
