High-resolution imaging of the galactic cloud monoceros R2

Constantine P. Gonatas*, Patrick Palmer, G. Novak

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We present high-resolution images (9″8 × 8″.5 beam size) of HCO+ J = 1→0 emission from the Galactic cloud Mon R2 obtained using the Hat Creek millimeter interferometer and the Five College Radio Astronomy Observatory 14 m antenna. The HCO+ emission comes from small optically thick clumps as well as from an extended component. We discuss the relationship between the H II region, as traced by the continuum emission, molecular outflows, as traced by CO emission, and the dense molecular cloud, as traced by the HCO+ emission. The abundance of HCO+ in the most massive part of the cloud is consistent with values derived from recent molecular line surveys, but it is relatively enhanced in the less massive regions.

Original languageEnglish (US)
Pages (from-to)118-127
Number of pages10
JournalAstrophysical Journal
Issue number1
StatePublished - 1992


  • H II regions
  • ISM: abundances
  • ISM: individual objects (Monoceros R2)
  • ISM: molecules
  • ISM: structure

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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