Orion B (NGC 2024). III. BIMA SO JK = 22 → 11 observations: Evidence for peculiar sulfur chemistry

Peter J. Barnes, Richard M. Crutcher

Research output: Contribution to journalArticlepeer-review


We present aperture synthesis maps of SO JK = 22 → 11 emission at 86.093938 GHz of the molecular cloud Orion B obtained from combined BIMA/NRAO 12 m data. The spatial resolution is 11″ × 7″ and the velocity resolution is 0.54 km s-1. The maps show fine structure in the dense molecular core, the main features being two relatively compact components aligned with the long, quiescent, NS-oriented ridge of previous maps. Most notable, however, is the ∼1-2 km s-1 blueshift of this line with respect to other high-density tracers of the main core. Implications of these data for the chemistry of SO in dense clouds are discussed.

Original languageEnglish (US)
Pages (from-to)325-337
Number of pages13
JournalAstrophysical Journal
Issue number1
StatePublished - Apr 10 1992


  • ISM: individual (NGC 2024)
  • ISM: molecules
  • ISM: structure
  • Molecular processes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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