Herschel observations of deuterated water towards Sgr B2(M)
Journal article, 2010
Observations of HDO are an important complement for studies of water, because they give strong constraints on the formation processes - grain surfaces versus energetic process in the gas phase, e.g. in shocks. The HIFI observations of multiple transitions of HDO in Sgr B2(M) presented here allow the determination of the HDO abundance throughout the envelope, which has not been possible before with ground-based observations only. The abundance structure has been modeled with the spherical Monte Carlo radiative transfer code RATRAN, which also takes radiative pumping by continuum emission from dust into account. The modeling reveals that the abundance of HDO rises steeply with temperature from a low abundance (2.5 \times 10^-11) in the outer envelope at temperatures below 100 K through a medium abundance (1.5 \times 10^-9) in the inner envelope/outer core at temperatures between 100 and 200 K, and finally a high abundance (3.5 \times 10^-9) at temperatures above 200 K in the hot core. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Author
C. Comito
Max Planck Society
P. Schilke
Max Planck Society
University of Cologne
R. Rolffs
University of Cologne
Max Planck Society
D. C. Lis
California Institute of Technology (Caltech)
A. Belloche
Max Planck Society
E. A. Bergin
University of Michigan
T. G. Phillips
California Institute of Technology (Caltech)
T. A. Bell
California Institute of Technology (Caltech)
N. R. Crockett
University of Michigan
S. Wang
University of Michigan
G. A. Blake
California Institute of Technology (Caltech)
E. Caux
University of Toulouse
LUTH - Laboratoire de l'Univers et de ses Theories
C. Ceccarelli
Laboratoire d'Astrophysique de l'Observatoire de Grenoble
J. Cernicharo
Centro de Astrobiologia (CAB)
F. Daniel
LUTH - Laboratoire de l'Univers et de ses Theories
Centro de Astrobiologia (CAB)
M.-L. Dubernet
LUTH - Laboratoire de l'Univers et de ses Theories
M. Emprechtinger
California Institute of Technology (Caltech)
P. Encrenaz
LUTH - Laboratoire de l'Univers et de ses Theories
M. Gerin
LUTH - Laboratoire de l'Univers et de ses Theories
T. F. Giesen
University of Cologne
J. R. Goicoechea
Centro de Astrobiologia (CAB)
P. F. Goldsmith
Jet Propulsion Laboratory, California Institute of Technology
H. Gupta
Jet Propulsion Laboratory, California Institute of Technology
E. Herbst
Ohio State University
C. Joblin
University of Toulouse
LUTH - Laboratoire de l'Univers et de ses Theories
D. Johnstone
National Research Council Canada
W. D. Langer
Jet Propulsion Laboratory, California Institute of Technology
W. D. Latter
California Institute of Technology (Caltech)
S. D. Lord
California Institute of Technology (Caltech)
S. Maret
Laboratoire d'Astrophysique de l'Observatoire de Grenoble
P. G. Martin
Canadian Institute for Theoretical Astrophysics
G. J. Melnick
Harvard-Smithsonian Center for Astrophysics
K. M. Menten
Max Planck Society
P. Morris
California Institute of Technology (Caltech)
H. S. P. Müller
University of Cologne
J. A. Murphy
Maynooth University
D. A. Neufeld
Johns Hopkins University
V. Ossenkopf
University of Cologne
Netherlands Institute for Space Research (SRON)
J. C. Pearson
Jet Propulsion Laboratory, California Institute of Technology
M. Pérault
LUTH - Laboratoire de l'Univers et de ses Theories
R. Plume
University of Calgary
S.-L. Qin
University of Cologne
S. Schlemmer
University of Cologne
J. Stutzki
University of Cologne
N. Trappe
Maynooth University
F. F. S. van der Tak
Netherlands Institute for Space Research (SRON)
C. Vastel
LUTH - Laboratoire de l'Univers et de ses Theories
University of Toulouse
H. W. Yorke
Jet Propulsion Laboratory, California Institute of Technology
S. Yu
Jet Propulsion Laboratory, California Institute of Technology
Michael Olberg
Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy
R. Szczerba
Polish Academy of Sciences
B. Larsson
Stockholm University
René Liseau
Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics
Robert Lin
Jet Propulsion Laboratory, California Institute of Technology
A. Samoska
Jet Propulsion Laboratory, California Institute of Technology
Erich Schlecht
Jet Propulsion Laboratory, California Institute of Technology
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 521 1 L38+- L38Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
DOI
10.1051/0004-6361/201015121