Three-dimensional dust mapping in the Orion Complex, combining
  Gaia-TGAS, 2MASS, and WISE
  We present a map of the three-dimensional (3D) distribution of dust in the
Orion complex. Orion is the closest site of high-mass star formation, making it
an excellent laboratory for studying the interstellar medium and star
formation. We use data from the Gaia-TGAS catalogue combined with photometry
from 2MASS and WISE to get the distances and extinctions of individual stars in
the vicinity of the Orion complex. We adopt the non-parametric method of Rezaei
Kh. et al. (2017) to infer the probability distribution function of the dust
densities at arbitrary points throughout the region. We map the dust
distribution towards different parts of the Orion complex and find the distance
and depth of the cloud compatible with other recent works which show the
ability of the method to be applicable on the local molecular clouds to map
their 3D dust distribution. We also demonstrate the danger of only using
colours of stars to derive their extinctions without considering further
physical constraints like the colour-magnitude diagram (CMD).
