DIFFUSE ATOMIC AND MOLECULAR GAS IN THE INTERSTELLAR MEDIUM OF M82 TOWARD SN 2014J

@article{Ritchey2014DIFFUSEAA,
  title={DIFFUSE ATOMIC AND MOLECULAR GAS IN THE INTERSTELLAR MEDIUM OF M82 TOWARD SN 2014J},
  author={Adam M. Ritchey and Daniel E. Welty and Julie A. Dahlstrom and Donald G. York},
  journal={The Astrophysical Journal},
  year={2014},
  volume={799}
}
We present a comprehensive analysis of interstellar absorption lines seen in moderately high resolution, high signal-to-noise ratio optical spectra of SN 2014J in M82. Our observations were acquired over the course of six nights, covering the period from ∼6 days before to ∼30 days after the supernova reached its maximum B-band brightness. We examine complex absorption from Na i, Ca ii, K i, Ca i, CH+, CH, and CN, arising primarily from diffuse gas in the interstellar medium (ISM) of M82. We… 

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