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+- L38

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

DOI

10.1051/0004-6361/201015121

More information

Latest update

10/30/2018