First results of an H-alpha based search of classical Be stars in the
  Perseus Arm and beyond
  We investigate a region of the Galactic plane, between 120 <= l <= 140 and -1
<= b <= +4, and uncover a population of moderately reddened (E(B-V) \sim 1)
classical Be stars within and beyond the Perseus and Outer Arms. 370 candidate
emission line stars (13 <= r <= 16) selected from the INT Photometric H-alpha
Survey of the Northern Galactic plane (IPHAS) have been followed up
spectroscopically. A subset of these, 67 stars with properties consistent with
those of classical Be stars, have been observed at sufficient spectral
resolution (Delta_lambda \sim 2 - 4 Angstrom) at blue wavelengths to narrow
down their spectral types. We determine these to a precision estimated to be
+/- 1 sub-type and then we measure reddenings via SED fitting with reference to
appropriate model atmospheres. Corrections for contribution to colour excess
from circumstellar discs are made using an established scaling to H-alpha
emission equivalent width. Spectroscopic parallaxes are obtained after
luminosity class has been constrained via estimates of distances to
neighbouring A/F stars with similar reddenings. Overwhelmingly, the stars in
the sample are confirmed as luminous classical Be stars at heliocentric
distances ranging from 2 kpc up to \sim 12 kpc. However, the errors are
presently too large to enable the cumulative distribution function with respect
to distance to distinguish between models placing the stars exclusively in
spiral arms, or in a smooth exponentially-declining distribution.
