SIMBAD references

2000ApJ...539L..93S - Astrophys. J., 539, L93-L96 (2000/August-3)

Submillimeter wave astronomy satellite observations of extended water emission in Orion.

SNELL R.L., HOWE J.E., ASHBY M.L.N., BERGIN E.A., CHIN G., ERICKSON N.R., GOLDSMITH P.F., HARWIT M., KLEINER S.C., KOCH D.G., NEUFELD D.A., PATTEN B.M., PLUME R., SCHIEDER R., STAUFFER J.R., TOLLS V., WANG Z., WINNEWISSER G., ZHANG Y.F. and MELNICK G.J.

Abstract (from CDS):

We have used the Submillimeter Wave Astronomy Satellite to map the ground-state 1₁₀⟶1₀₁ transition of ortho-H₂O at 557 GHz in the Orion molecular cloud. H₂O emission was detected in Orion over an angular extent of about 20', or nearly 3 pc. The water emission is relatively weak, with line widths (3-6 km.s^–1) and V_LSR velocities (9-11 km.s^–1) consistent with an origin in the cold gas of the molecular ridge. We find that the ortho-H₂O abundance relative to H₂ in the extended gas in Orion varies between 1 and 8x10^–8, with an average of 3x10^–8. The absence of detectable narrow-line ortho-H₂¹⁸O emission is used to set a 3 σ upper limit on the relative ortho-H₂O abundance of 7x10^–8.

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Journal keyword(s): ISM: Abundances - ISM: Clouds - ISM: Individual: Name: Orion - ISM: Molecules - Radio Lines: ISM

Simbad objects: 6

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