Kristensen, L. E., Visser, R., van Dishoeck, E. F., Yildiz, U. A., Doty, S. D., Herczeg, G. J., Liu, F. -C., Parise, B., Jorgensen, J. K., van Kempen, T. A., Brinch, C., Wampfler, S. F., Bruderer, S., Benz, A. O., Hogerheijde, M. R., Deul, E., Bachiller, R., Baudry, A., Benedettini, M., Bergin, E. A., Bjerkeli, P., Blake, G. A., Bontemps, S., Braine, J., Caselli, P., Cernicharo, J., Codella, C., Daniel, F., de Graauw, Th., di Giorgio, A. M., Dominik, C., Encrenaz, P., Fich, M., Fuente, A., Giannini, T., Goicoechea, J. R., Helmich, F., Herpin, F., Jacq, T., Johnstone, D., Kaufman, M. J., Larsson, B., Lis, D., Liseau, R., Marseille, M., McCoey, C., Melnick, G., Neufeld, D., Nisini, B., Olberg, M., Pearson, J. C., Plume, R., Risacher, C., Santiago-Garcia, J., Saraceno, P., Shipman, R., Tafalla, M., Tielens, A. G. G. M., van der Tak, F., Wyrowski, F., Beintema, D., de Jonge, A., Dieleman, P., Ossenkopf, V., Roelfsema, P., Stutzki, J. and Whyborn, N. (2010). Water in low-mass star-forming regions with Herschel HIFI spectroscopy of NGC 1333. Astron. Astrophys., 521. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 0004-6361

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Abstract

Water In Star-forming regions with Herschel (WISH) is a key programme dedicated to studying the role of water and related species during the star-formation process and constraining the physical and chemical properties of young stellar objects. The Heterodyne Instrument for the Far-Infrared (HIFI) on the Herschel Space Observatory observed three deeply embedded protostars in the low-mass star-forming region NGC 1333 in several (H2O)-O-16, (H2O)-O-18, and CO transitions. Line profiles are resolved for five (H2O)-O-16 transitions in each source, revealing them to be surprisingly complex. The line profiles are decomposed into broad (>20 km s(-1)), medium-broad (similar to 5-10 km s(-1)), and narrow (<5 kms(-1)) components. The (H2O)-O-18 emission is only detected in broad 1(10)-1(01) lines (>20 km s(-1)), indicating that its physical origin is the same as for the broad (H2O)-O-16 component. In one of the sources, IRAS4A, an inverse P Cygni profile is observed, a clear sign of infall in the envelope. From the line profiles alone, it is clear that the bulk of emission arises from shocks, both on small (less than or similar to 1000 AU) and large scales along the outflow cavity walls (similar to 10 000 AU). The H2O line profiles are compared to CO line profiles to constrain the H2O abundance as a function of velocity within these shocked regions. The H2O/CO abundance ratios are measured to be in the range of similar to 0.1-1, corresponding to H2O abundances of similar to 10(-5)-10(-4) with respect to H-2. Approximately 5-10% of the gas is hot enough for all oxygen to be driven into water in warm post-shock gas, mostly at high velocities.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Kristensen, L. E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Visser, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Dishoeck, E. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yildiz, U. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doty, S. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herczeg, G. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liu, F. -C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parise, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jorgensen, J. K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van Kempen, T. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brinch, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wampfler, S. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruderer, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benz, A. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hogerheijde, M. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Deul, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bachiller, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Baudry, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Benedettini, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bergin, E. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bjerkeli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blake, G. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bontemps, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braine, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Caselli, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cernicharo, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Codella, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Daniel, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Graauw, Th.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
di Giorgio, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dominik, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Encrenaz, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fich, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fuente, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giannini, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Goicoechea, J. R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Helmich, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Herpin, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jacq, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Johnstone, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kaufman, M. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Larsson, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lis, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Liseau, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marseille, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
McCoey, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Melnick, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Neufeld, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nisini, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olberg, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pearson, J. C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Plume, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Risacher, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Santiago-Garcia, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saraceno, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shipman, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tafalla, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tielens, A. G. G. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
van der Tak, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wyrowski, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beintema, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de Jonge, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Dieleman, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ossenkopf, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Roelfsema, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzki, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Whyborn, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-494916
DOI: 10.1051/0004-6361/201015100
Journal or Publication Title: Astron. Astrophys.
Volume: 521
Date: 2010
Publisher: EDP SCIENCES S A
Place of Publication: LES ULIS CEDEX A
ISSN: 0004-6361
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
PROTOSTELLAR ENVELOPES; PHYSICAL STRUCTURE; NGC-1333 IRAS-4; SUBMILLIMETER; PROTOSTARS; EMISSION; OUTFLOW; ABUNDANCE; VAPOR; DISKMultiple languages
Astronomy & AstrophysicsMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49491

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