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

Leiden University

Max Planck Institute

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

Arcetri Astrophysical Observatory

University of Leeds

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 Institute

F. Herpin

University of Rome Tor Vergata

T. Jacq

Arcetri Astrophysical Observatory

D. Johnstone

National Research Council Canada

University of Victoria

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 Institute

R. Plume

University of Calgary

C. Risacher

Netherlands Institute for Space Research (SRON)

J. Santiago-García

Instituto de Radioastronomía Milimétrica

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 Institute

F. F. S. van der Tak

University of Groningen

Netherlands Institute for Space Research (SRON)

W. Jellema

Netherlands Institute for Space Research (SRON)

Aggm Tielens

Leiden University

P. Hartogh

Max Planck Institute

J. Stutzki

University of Cologne

R. Szczerba

Polish Academy of Sciences

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 521 1 L33+- L33

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

DOI

10.1051/0004-6361/201015104

More information

Latest update

5/23/2019