The little-studied cluster Berkeley 90. II. The foreground ISM

  title={The little-studied cluster Berkeley 90. II. The foreground ISM},
  author={Jes'us Ma'iz Apell'aniz and Rodolfo H. Barb'a and A. Sota and Sergio Sim'on-D'iaz},
  journal={arXiv: Astrophysics of Galaxies},
Context: Nearly one century after their discovery, the carrier(s) of Diffuse Interstellar Bands is/are still unknown and there are few sightlines studied in detail for a large number of DIBs. Aims: We want to study the ISM sightlines towards LS III +46 11 and LS III +46 12, two early-O-type stellar systems, and LS III +46 11 B, a mid-B-type star. The three targets are located in the stellar cluster Berkeley 90 and have a high extinction. Methods: We use the multi-epoch high-S/N optical spectra… 

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