Corpus ID: 118371125

H I spin temperature in the Fermi-LAT era

  title={H I spin temperature in the Fermi-LAT era},
  author={Guðlaugur J{\'o}hannesson and Igor V. Moskalenko and S. W. Digel and for the Star Collaboration},
  journal={arXiv: High Energy Astrophysical Phenomena},
The diffuse high-energy gamma-ray emission of the Milky Way arises from interactions of cosmic-rays (CRs) with interstellar gas and radiation field in the Galaxy. The neutral hydrogen (H I) gas component is by far the most massive and broadly distributed component of the interstellar medium. Using the 21-cm emission line from the hyperfine structure transition of atomic hydrogen it is possible to determine the column density of H I if the spin temperature (Ts) of the emitting gas is known… Expand

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