Observations of HCO(+) in B335

Details Observations of HCO(+) in B335 Observations of HCO(+) in B335

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...374..177h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 374, June 10, 1991, p. 177-185. Research supported by NSERC and University

Astronomy and Astrophysics

Astronomy

9

Emission Spectra, Far Infrared Radiation, Formyl Ions, Infrared Sources (Astronomy), Abundance, Astronomical Spectroscopy, Carbon Monoxide, Dark Matter, Red Shift

Scientific paper

A 60 arcsec square region observed in B335 centered on its far-IR source in the emission of HCO(+) (3-2), HCO(+) (4-3), and H(C-13)O(+) (3-2). The HCO(+) (3-2) emission is confined to this region and is centered on the IR source. At the IR position there is a region about 14 arcsec or less in diameter with strong emission of HCO(+) (4-3). Ratios of the lines indicate a gas density greater than 10 to the 6th/cu cm at one position on the IR source. Also at the same position, the antenna temperatures and ratios of the lines indicate a gas kinetic temperature significantly higher than 10 K. The dense gas traced by the lines cannot be responsible for the collimation of the CO outflow. The HCO(+) (3-2) lines have redshifted high-velocity components, which have velocity extents similar to that of the CO wing components. The density of the HCO(+) (3-2) high-velocity gas is at least 10.000/cu cm, comparable to that of the quiescent dense gas in B335.

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