New members of the massive stellar population in Cygnus

  title={New members of the massive stellar population in Cygnus},
  author={Fernando Comer{\'o}n and Anna Pasquali},
  journal={Astronomy and Astrophysics},
Context. The Cygnus OB2 association and its surroundings display the richest collection of massive stars in our nearby Galactic environment and a wealth of signposts of the interaction between these stars and the interstellar gas. Aims. We perform a magnitude-limited, homogeneous census of O and early B-type stars with accurate spectral classifications in the blue, in a 6 ◦ × 4 ◦ region centered on Cygnus OB2 that includes most of the Cygnus X complex, a sizeable fraction of the adjacent Cygnus… 
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