Submillimeter emission from water in the W3 region

C. D. Wilson; A. Mason; E. Gregersen; A. O. H. Olofsson; P. Bergman; R. Booth; N. Boudet; V. Buat; C. L. Curry; P. Encrenaz; E. Falgarone; P. Feldman; M. Fich; H. G. Floren; U. Frisk; M. Gerin; J. Harju; T. Hasegawa; A. Hjalmarson; M. Juvela; N. Tothill

doi:10.1051/0004-6361:20030340

Submillimeter emission from water in the W3 region

C. D. Wilson, A. Mason, E. Gregersen, A. O. H. Olofsson, P. Bergman, R. Booth, N. Boudet, V. Buat, C. L. Curry, P. Encrenaz, E. Falgarone, P. Feldman, M. Fich, H. G. Floren, U. Frisk, M. Gerin, J. Harju, T. Hasegawa, A. Hjalmarson, M. JuvelaN. Tothill

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Abstract

Using the Odin satellite, we have mapped the submillimeter emission from the l10-l01 transition of ortho-water in the W3 star-forming region. A 5"² ÃƒÂ— 5"² map of the W3 IRS4 and W3 IRS5 region reveals strong water lines at half the positions in the map. The relative strength of the Odin lines compared to previous observations by SWAS suggests that we are seeing water emission from an extended region. Across much of the map the lines are double-peaked, with an absorption feature at - 39 km s-1; however, some positions in the map show a single strong line at -43 km s-1. We interpret the double-peaked lines as arising from optically thick, self-absorbed water emission near the W3 IRS5, while the narrower blue-shifted lines originate in emission near W3 IRS4. In this model, the unusual appearance of the spectral lines across the map results from a coincidental agreement in velocity between the emission near W3 IRS4 and the blue peak of the more complex lines near W3 IRS5. The strength of the water lines near W3 IRS4 suggests we may be seeing water emission enhanced in a photon-dominated region.

Original language	English
Pages (from-to)	L59-L62
Number of pages	4
Journal	Astronomy and Astrophysics
Volume	402
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20030340
Publication status	Published - 2003

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Wilson, C. D., Mason, A., Gregersen, E., Olofsson, A. O. H., Bergman, P., Booth, R., Boudet, N., Buat, V., Curry, C. L., Encrenaz, P., Falgarone, E., Feldman, P., Fich, M., Floren, H. G., Frisk, U., Gerin, M., Harju, J., Hasegawa, T., Hjalmarson, A., ... Tothill, N. (2003). Submillimeter emission from water in the W3 region. Astronomy and Astrophysics, 402(3), L59-L62. https://doi.org/10.1051/0004-6361:20030340

@article{0c31c457465e460d9b6d785ae12aba8c,

title = "Submillimeter emission from water in the W3 region",

abstract = "Using the Odin satellite, we have mapped the submillimeter emission from the l10-l01 transition of ortho-water in the W3 star-forming region. A 5{"}² {\~A}ƒ{\^A}— 5{"}² map of the W3 IRS4 and W3 IRS5 region reveals strong water lines at half the positions in the map. The relative strength of the Odin lines compared to previous observations by SWAS suggests that we are seeing water emission from an extended region. Across much of the map the lines are double-peaked, with an absorption feature at - 39 km s-1; however, some positions in the map show a single strong line at -43 km s-1. We interpret the double-peaked lines as arising from optically thick, self-absorbed water emission near the W3 IRS5, while the narrower blue-shifted lines originate in emission near W3 IRS4. In this model, the unusual appearance of the spectral lines across the map results from a coincidental agreement in velocity between the emission near W3 IRS4 and the blue peak of the more complex lines near W3 IRS5. The strength of the water lines near W3 IRS4 suggests we may be seeing water emission enhanced in a photon-dominated region.",

author = "Wilson, {C. D.} and A. Mason and E. Gregersen and Olofsson, {A. O. H.} and P. Bergman and R. Booth and N. Boudet and V. Buat and Curry, {C. L.} and P. Encrenaz and E. Falgarone and P. Feldman and M. Fich and Floren, {H. G.} and U. Frisk and M. Gerin and J. Harju and T. Hasegawa and A. Hjalmarson and M. Juvela and N. Tothill",

year = "2003",

doi = "10.1051/0004-6361:20030340",

language = "English",

volume = "402",

pages = "L59--L62",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "3",

}

Wilson, CD, Mason, A, Gregersen, E, Olofsson, AOH, Bergman, P, Booth, R, Boudet, N, Buat, V, Curry, CL, Encrenaz, P, Falgarone, E, Feldman, P, Fich, M, Floren, HG, Frisk, U, Gerin, M, Harju, J, Hasegawa, T, Hjalmarson, A, Juvela, M & Tothill, N 2003, 'Submillimeter emission from water in the W3 region', Astronomy and Astrophysics, vol. 402, no. 3, pp. L59-L62. https://doi.org/10.1051/0004-6361:20030340

TY - JOUR

T1 - Submillimeter emission from water in the W3 region

AU - Wilson, C. D.

AU - Mason, A.

AU - Gregersen, E.

AU - Olofsson, A. O. H.

AU - Bergman, P.

AU - Booth, R.

AU - Boudet, N.

AU - Buat, V.

AU - Curry, C. L.

AU - Encrenaz, P.

AU - Falgarone, E.

AU - Feldman, P.

AU - Fich, M.

AU - Floren, H. G.

AU - Frisk, U.

AU - Gerin, M.

AU - Harju, J.

AU - Hasegawa, T.

AU - Hjalmarson, A.

AU - Juvela, M.

AU - Tothill, N.

PY - 2003

Y1 - 2003

N2 - Using the Odin satellite, we have mapped the submillimeter emission from the l10-l01 transition of ortho-water in the W3 star-forming region. A 5"² ÃƒÂ— 5"² map of the W3 IRS4 and W3 IRS5 region reveals strong water lines at half the positions in the map. The relative strength of the Odin lines compared to previous observations by SWAS suggests that we are seeing water emission from an extended region. Across much of the map the lines are double-peaked, with an absorption feature at - 39 km s-1; however, some positions in the map show a single strong line at -43 km s-1. We interpret the double-peaked lines as arising from optically thick, self-absorbed water emission near the W3 IRS5, while the narrower blue-shifted lines originate in emission near W3 IRS4. In this model, the unusual appearance of the spectral lines across the map results from a coincidental agreement in velocity between the emission near W3 IRS4 and the blue peak of the more complex lines near W3 IRS5. The strength of the water lines near W3 IRS4 suggests we may be seeing water emission enhanced in a photon-dominated region.

AB - Using the Odin satellite, we have mapped the submillimeter emission from the l10-l01 transition of ortho-water in the W3 star-forming region. A 5"² ÃƒÂ— 5"² map of the W3 IRS4 and W3 IRS5 region reveals strong water lines at half the positions in the map. The relative strength of the Odin lines compared to previous observations by SWAS suggests that we are seeing water emission from an extended region. Across much of the map the lines are double-peaked, with an absorption feature at - 39 km s-1; however, some positions in the map show a single strong line at -43 km s-1. We interpret the double-peaked lines as arising from optically thick, self-absorbed water emission near the W3 IRS5, while the narrower blue-shifted lines originate in emission near W3 IRS4. In this model, the unusual appearance of the spectral lines across the map results from a coincidental agreement in velocity between the emission near W3 IRS4 and the blue peak of the more complex lines near W3 IRS5. The strength of the water lines near W3 IRS4 suggests we may be seeing water emission enhanced in a photon-dominated region.

UR - http://handle.uws.edu.au:8081/1959.7/548882

U2 - 10.1051/0004-6361:20030340

DO - 10.1051/0004-6361:20030340

M3 - Article

SN - 0004-6361

VL - 402

SP - L59-L62

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

Submillimeter emission from water in the W3 region

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