Herschel observations of deuterated water towards Sgr B2(M)
Artikel i vetenskaplig tidskrift, 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.

Författare

C. Comito

Max Planck-institutet

P. Schilke

Universitat zu Koln

Max Planck-institutet

R. Rolffs

Universitat zu Koln

Max Planck-institutet

D. C. Lis

California Institute of Technology

A. Belloche

Max Planck-institutet

E. A. Bergin

University Michigan Ann Arbor

T. G. Phillips

California Institute of Technology

T. A. Bell

California Institute of Technology

N. R. Crockett

University Michigan Ann Arbor

S. Wang

University Michigan Ann Arbor

G. A. Blake

California Institute of Technology

E. Caux

Universite de Toulouse

LUTH - Laboratoire de l'Univers et de ses Theories

C. Ceccarelli

Laboratoire d'Astrophysique de l'Observatoire de Grenoble

J. Cernicharo

CSIC-INTA - Centro de Astrobiologia (CAB)

F. Daniel

CSIC-INTA - Centro de Astrobiologia (CAB)

LUTH - Laboratoire de l'Univers et de ses Theories

M.-L. Dubernet

LUTH - Laboratoire de l'Univers et de ses Theories

M. Emprechtinger

California Institute of Technology

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

Universitat zu Koln

J. R. Goicoechea

CSIC-INTA - 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

Universite de 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

S. D. Lord

California Institute of Technology

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-institutet

P. Morris

California Institute of Technology

H. S. P. Müller

Universitat zu Koln

J. A. Murphy

Maynooth University

D. A. Neufeld

Johns Hopkins University

V. Ossenkopf

SRON Netherlands Institute for Space Research

Universitat zu Koln

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

Universitat zu Koln

S. Schlemmer

Universitat zu Koln

J. Stutzki

Universitat zu Koln

N. Trappe

Maynooth University

F. F. S. van der Tak

SRON Netherlands Institute for Space Research

C. Vastel

Universite de Toulouse

LUTH - Laboratoire de l'Univers et de ses Theories

H. W. Yorke

Jet Propulsion Laboratory, California Institute of Technology

S. Yu

Jet Propulsion Laboratory, California Institute of Technology

Michael Olberg

Chalmers, Institutionen för radio- och rymdvetenskap, Nationella anläggningen för radioastronomi

R. Szczerba

Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences

B. Larsson

Stockholms universitet

René Liseau

Chalmers, Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik

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 L38+- L38

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.1051/0004-6361/201015121