Chemistry in dense photon-dominated regions

A. Sternberg, A. Dalgarno

Research output: Contribution to journalArticlepeer-review


We present a detailed chemical model of a photon-dominated region produced in a dense molecular cloud exposed to an intense far-ultraviolet radiation field. We use it to illustrate the gas-phase processes that lead to the production of atomic and molecular species in the several distinct zones that occur in the cloud. We identify molecular diagnostics of photon-dominated chemistry in dense molecular clouds.

Original languageEnglish
Pages (from-to)565-607
Number of pages43
JournalAstrophysical Journal, Supplement Series
Issue number2
StatePublished - 1995


  • Galaxies: ISM
  • ISM: molecules
  • Molecular processes


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