2000ApJ...539L..93S

Query : 2000ApJ...539L..93S

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 VLSR 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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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
2 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
3 OMC 2 MoC 05 35 27 -05 10.1           ~ 475 1
4 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 715 1
5 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
6 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1

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