Submillimeter HCO+ observations of dense cloud cores

Details Submillimeter HCO+ observations of dense cloud cores Submillimeter HCO+ observations of dense cloud cores

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.260..195r&link_type=abstract

In ESA Proceedings of an ESA Workshop on a Spaceborne Submillimeter Astronomy Mission. A Cornerstone of the ESA Long Term Scienc

Astronomy and Astrophysics

Astronomy

Hydrogen Compounds, Interstellar Chemistry, Molecular Clouds, Molecular Spectra, Abundance, Gas Density, Line Spectra

Scientific paper

Submillimeter wavelength observations of the cores of the molecular clouds S255, DR21, DR21 (OH), OMC2, and Mon R2, in the J = 4-3 transitions of HCO(+) and H13CO(+) were made. The line profiles suggest the presence of small scale clumping in the densest regions. The data are analyzed with continuum measurements at 370 microns, which are used to estimate average gas densities. Hence, constraints are placed on the relative abundance of HCO(+), and dilution factors derived. Such submillimeter observations of dense and inhomogeneous cloud cores have the advantage of not being contaminated by emission and absorption in any less dense interclump medium or foreground material.

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