Herschel-HIFI observations of H2O in high-mass star-forming regions: first results
VAN DER TAK, Floris
SRON Netherlands Institute for Space Research [SRON]
Max-Planck-Institut für Radioastronomie [MPIFR]
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SRON Netherlands Institute for Space Research [SRON]
Max-Planck-Institut für Radioastronomie [MPIFR]
VAN DER TAK, Floris
SRON Netherlands Institute for Space Research [SRON]
Max-Planck-Institut für Radioastronomie [MPIFR]
< Reduce
SRON Netherlands Institute for Space Research [SRON]
Max-Planck-Institut für Radioastronomie [MPIFR]
Language
en
Communication dans un congrès
This item was published in
EAS Publications Series, Volume 52, 2011, pp.201-204, EAS Publications Series, Volume 52, 2011, pp.201-204, Conditions and Impact of Star Formation, 2010, Zermatt. 2011, vol. 52, p. 201-204
English Abstract
This paper reviews the first results of observations of H2O line emission with Herschel-HIFI towards high-mass star-forming regions, obtained within the WISH guaranteed time program. The data reveal three kinds of gas-phase ...Read more >
This paper reviews the first results of observations of H2O line emission with Herschel-HIFI towards high-mass star-forming regions, obtained within the WISH guaranteed time program. The data reveal three kinds of gas-phase H2O: 'cloud water' in cold tenuous foreground clouds, 'envelope water' in dense protostellar envelopes, and 'outflow water' in protostellar outflows. The low H2O abundance (1e-10 -- 1e-9) in foreground clouds and protostellar envelopes is due to rapid photodissociation and freeze-out on dust grains, respectively. The outflows show higher H2O abundances (1e-7 -- 1e-6) due to grain mantle evaporation and (probably) neutral-neutral reactions.Read less <
English Keywords
Astrophysics
Galaxy Astrophysics
Origin
Hal imported