Corpus ID: 118387412

Interstellar medium in the M 43 nebula

  title={Interstellar medium in the M 43 nebula},
  author={Piotr Gnaciński},
  journal={arXiv: Astrophysics of Galaxies},
  • P. Gnaciński
  • Published 31 December 2008
  • Physics
  • arXiv: Astrophysics of Galaxies
We present a list of interstellar absorption lines in the direction of HD 37061 in the M 43 nebula. Some of the absorption lines arise from atomic excited levels that are uncommon in interstellar clouds. The excited levels of Fe II are populated by fluorescence. We found a large number of H2 molecular absorption lines arising from vibrationally excited levels. The ortho/para H2 ratio is equal to 2.7. The H2 rotational temperature of vibrational levels 1 - 5 exceeds 2000 K. 

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