Sensitive limits on the abundance of cold water vapor in the DM Tauri protoplanetary disk
Artikel i vetenskaplig tidskrift, 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.

Författare

E. A. Bergin

University of Michigan

M. R. Hogerheijde

Universiteit Leiden

C. Brinch

Universiteit Leiden

J. Fogel

University of Michigan

U. A. Yildiz

Universiteit Leiden

L. Kristensen

Universiteit Leiden

E. F. van Dishoeck

Universiteit Leiden

Max Planck-institutet

T. A. Bell

Caltech Division of Geological and Planetary Sciences

G. A. Blake

Centro de Astrobiologia (CAB)

J. Cernicharo

Anton Pannekoek Institute for Astronomy

C. Dominik

Radboud Universiteit

Anton Pannekoek Institute for Astronomy

D. Lis

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

Observatorio Astronomico Nacional

A. Baudry

Universita degli Studi di Roma Tor Vergata

M. Benedettini

Osservatorio Astrofisico di Arcetri

A. O. Benz

Eidgenössische Technische Hochschule Zürich (ETH)

Per Bjerkeli

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

S. Bontemps

Laboratoire d'Astrophysique de Bordeaux

Institut National des Sciences de l'Univers

J. Braine

University of Leeds

S. Bruderer

Eidgenössische Technische Hochschule Zürich (ETH)

P. Caselli

Osservatorio Astrofisico di Arcetri

University of Leeds

C. Codella

Osservatorio Astrofisico di Arcetri

F. Daniel

Centro de Astrobiologia (CAB)

A. M. di Giorgio

Universita degli Studi di Roma 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

Observatorio Astronomico Nacional

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-institutet

F. Herpin

Universita degli Studi di Roma Tor Vergata

T. Jacq

Osservatorio Astrofisico di Arcetri

D. Johnstone

National Research Council Canada

University of Victoria

J. K. Jorgensen

Köbenhavns Universitet

B. Larsson

Stockholms universitet

René Liseau

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

M. Marseille

Netherlands Institute for Space Research (SRON)

C. McCoey

University of Waterloo

Western University

B. Nisini

Universita degli Studi di Roma Tor Vergata

Michael Olberg

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

B. Parise

Max Planck-institutet

R. Plume

University of Calgary

C. Risacher

Netherlands Institute for Space Research (SRON)

J. Santiago-García

Instituto de Radioastronomia Milimetrica

P. Saraceno

Universita degli Studi di Roma Tor Vergata

R. Shipman

Netherlands Institute for Space Research (SRON)

M. Tafalla

Observatorio Astronomico Nacional

T. A. van Kempen

Harvard-Smithsonian Center for Astrophysics

R. Visser

Universiteit Leiden

S. F. Wampfler

Eidgenössische Technische Hochschule Zürich (ETH)

F. Wyrowski

Max Planck-institutet

F. F. S. van der Tak

Netherlands Institute for Space Research (SRON)

Rijksuniversiteit Groningen

W. Jellema

Netherlands Institute for Space Research (SRON)

Aggm Tielens

Universiteit Leiden

P. Hartogh

Max Planck-institutet

J. Stutzki

Universität zu Köln

R. Szczerba

Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences

Astronomy and Astrophysics

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

Vol. 521 L33+- L33

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.1051/0004-6361/201015104