Molecular Abundance Enhancements in the Highly Collimated Bipolar Outflow BHR 71

• DOI: 10.1086/306534
• Publication Date: 2002-07-26T18:50:42Z
• Authors: Guido Garay; Ive Kohnenkamp; Tyler L. Bourke; L. F. Rodriguez; Kimmo K. Lehtinen
• Keywords: Outflow; Collimated light; Bipolar outflow; Silicon monoxide

We report observations of the J = 3 → 2 and 1 transitions SiO CS, Jk 3k 2k 1k CH3OH, 0 transition HCO+, made with Swedish-ESO Submillimetre Telescope (SEST), toward highly collimated bipolar outflow BHR 71. Broad wing emission was detected lobes in all observed molecular lines. The shapes profiles are strikingly different from molecule to molecule. For CS HCO+ outflowing gas appears as a weak broad feature superposed upon strong narrow quiescent ambient gas. CH3OH intensity is considerably stronger than that component, whereas for completely dominates spectra. spatial distribution integrated extended broadly similar transitions, showing well-separated blueshifted redshifted FWHM angular sizes 24 × 13 14, respectively. find abundance methanol silicon monoxide enhanced respect cloud by factors up ~40 350, large enhancements most likely due release grains ice mantles Si-bearing species via shocks produced interaction between dense On other hand, we smaller about factor 20, decrease consistent theoretical predictions shock models.