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

Max Planck-institutet

Universität zu Köln

R. Rolffs

Universität zu Köln

Max Planck-institutet

D. C. Lis

CalTech

A. Belloche

Max Planck-institutet

E. A. Bergin

University of Michigan

T. G. Phillips

CalTech

T. A. Bell

CalTech

N. R. Crockett

University of Michigan

S. Wang

University of Michigan

G. A. Blake

CalTech

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

LUTH - Laboratoire de l'Univers et de ses Theories

CSIC-INTA - Centro de Astrobiologia (CAB)

M.-L. Dubernet

LUTH - Laboratoire de l'Univers et de ses Theories

M. Emprechtinger

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

Universität zu Köln

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

LUTH - Laboratoire de l'Univers et de ses Theories

Universite de Toulouse

D. Johnstone

National Research Council Canada

W. D. Langer

Jet Propulsion Laboratory, California Institute of Technology

W. D. Latter

CalTech

S. D. Lord

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-institutet

P. Morris

CalTech

H. S. P. Müller

Universität zu Köln

J. A. Murphy

Maynooth University

D. A. Neufeld

Johns Hopkins University

V. Ossenkopf

Universität zu Köln

SRON Netherlands Institute for Space Research

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

Universität zu Köln

S. Schlemmer

Universität zu Köln

J. Stutzki

Universität zu Köln

N. Trappe

Maynooth University

F. F. S. van der Tak

SRON Netherlands Institute for Space Research

C. Vastel

LUTH - Laboratoire de l'Univers et de ses Theories

Universite de Toulouse

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