Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk
Journal article, 2010
We performed a sensitive search for the ground-state emission lines of ortho- and para-water vapor in the DM Tau protoplanetary disk using the Herschel/HIFI instrument. No strong lines are detected down to 3σ levels in 0.5 km s^-1 channels of 4.2 mK for the 1_10-1_01 line and 12.6 mK for the 1_11-0_00 line. We report a very tentative detection, however, of the 1_10-1_01 line in the wide band spectrometer, with a strength of T_mb = 2.7 mK, a width of 5.6 km s^-1 and an integrated intensity of 16.0 mK km s^-1. The latter constitutes a 6σ detection. Regardless of the reality of this tentative detection, model calculations indicate that our sensitive limits on the line strengths preclude efficient desorption of water in the UV illuminated regions of the disk. We hypothesize that more than 95-99% of the water ice is locked up in coagulated grains that have settled to the midplane. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with participation important from NASA.
Author
E. A. Bergin
University of Michigan
M. R. Hogerheijde
Leiden University
C. Brinch
Leiden University
J. Fogel
University of Michigan
U. A. Yildiz
Leiden University
L. Kristensen
Leiden University
E. F. van Dishoeck
Max Planck Society
Leiden University
T. A. Bell
California Institute of Technology (Caltech)
G. A. Blake
Centro de Astrobiologia (CAB)
J. Cernicharo
Anton Pannekoek Institute for Astronomy
C. Dominik
Radboud University
Anton Pannekoek Institute for Astronomy
D. Lis
California Institute of Technology (Caltech)
G. J. Melnick
Harvard-Smithsonian Center for Astrophysics
D. A. Neufeld
Johns Hopkins University
O. Panić
European Southern Observatory (ESO)
J. C. Pearson
Jet Propulsion Laboratory, California Institute of Technology
R. Bachiller
Spanish National Observatory (OAN)
A. Baudry
University of Rome Tor Vergata
M. Benedettini
Arcetri Astrophysical Observatory
A. O. Benz
Swiss Federal Institute of Technology in Zürich (ETH)
Per Bjerkeli
Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics
S. Bontemps
Institut National des Sciences de l'Univers
Laboratoire d'Astrophysique de Bordeaux
J. Braine
University of Leeds
S. Bruderer
Swiss Federal Institute of Technology in Zürich (ETH)
P. Caselli
University of Leeds
Arcetri Astrophysical Observatory
C. Codella
Arcetri Astrophysical Observatory
F. Daniel
Centro de Astrobiologia (CAB)
A. M. di Giorgio
University of Rome Tor Vergata
S. Doty
Denison University
P. Encrenaz
LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres
M. Fich
University of Waterloo
A. Fuente
Spanish National Observatory (OAN)
T. Giannini
Osservatorio Astronomico di Roma
J. R. Goicoechea
Centro de Astrobiologia (CAB)
T. de Graauw
Netherlands Institute for Space Research (SRON)
F. Helmich
Netherlands Institute for Space Research (SRON)
G. J. Herczeg
Max Planck Society
F. Herpin
University of Rome Tor Vergata
T. Jacq
Arcetri Astrophysical Observatory
D. Johnstone
University of Victoria
National Research Council Canada
J. K. Jorgensen
University of Copenhagen
B. Larsson
Stockholm University
René Liseau
Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics
M. Marseille
Netherlands Institute for Space Research (SRON)
C. McCoey
Western University
University of Waterloo
B. Nisini
University of Rome Tor Vergata
Michael Olberg
Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy
B. Parise
Max Planck Society
R. Plume
University of Calgary
C. Risacher
Netherlands Institute for Space Research (SRON)
J. Santiago-García
Institut de Radioastronomie Millimétrique (IRAM)
P. Saraceno
University of Rome Tor Vergata
R. Shipman
Netherlands Institute for Space Research (SRON)
M. Tafalla
Spanish National Observatory (OAN)
T. A. van Kempen
Harvard-Smithsonian Center for Astrophysics
R. Visser
Leiden University
S. F. Wampfler
Swiss Federal Institute of Technology in Zürich (ETH)
F. Wyrowski
Max Planck Society
F. F. S. van der Tak
Netherlands Institute for Space Research (SRON)
University of Groningen
W. Jellema
Netherlands Institute for Space Research (SRON)
Aggm Tielens
Leiden University
P. Hartogh
Max Planck Society
J. Stutzki
University of Cologne
R. Szczerba
Polish Academy of Sciences
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 521 1 L33+- L33Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
DOI
10.1051/0004-6361/201015104