Near infrared diffuse interstellar bands toward the Cygnus OB2 association

Satoshi Hamano, Naoto Kobayashi, Sohei Kondo +16

We obtained the near-infrared (NIR) high-resolution ($R\equiv \lambda /\Delta \lambda \sim 20,000$) spectra of the seven brightest early-type stars in the Cygnus OB2 association for investigating the en…