Herschel-PACS observation of the 10 Myr old T Tauri disk TW Hya Constraining the disk gas mass
Artikel i vetenskaplig tidskrift, 2010

Planets are formed in disks around young stars. With an age of similar to 10 Myr, TW Hya is one of the nearest T Tauri stars that is still surrounded by a relatively massive disk. In addition a large number of molecules has been found in the TW Hya disk, making TW Hya the perfect test case in a large survey of disks with Herschel-PACS to directly study their gaseous component. We aim to constrain the gas and dust mass of the circumstellar disk around TW Hya. We observed the fine-structure lines of [OI] and [CII] as part of the open-time large program GASPS. We complement this with continuum data and ground-based (12) CO 3-2 and (CO)-C-13 3-2 observations. We simultaneously model the continuum and the line fluxes with the 3D Monte-Carlo code MCFOST and the thermo-chemical code ProDiMo to derive the gas and dust masses. We detect the [OI] line at 63 mu m. The other lines that were observed, [OI] at 145 mu m and [CII] at 157 mu m, are not detected. No extended emission has been found. Preliminary modeling of the photometric and line data assuming [(CO)-C-12]/[(CO)-C-13] = 69 suggests a dust mass for grains with radius < 1 mm of similar to 1.9 x 10(-4) M-circle dot (total solid mass of 3 x 10(-3) M-circle dot) and a gas mass of (0.5-5) x 10(-3) M-circle dot. The gas-to-dust mass may be lower than the standard interstellar value of 100.

models

main-sequence stars

circumstellar disks

emission

x-ray

array

young stars

hydrae

spectra

protoplanetary disks

Författare

W. F. Thi

University of Edinburgh

Université Grenoble Alpes

G. Mathews

University of Hawaii

F. Menard

Université Grenoble Alpes

P. Woitke

University of St Andrews

University of Edinburgh

Royal Observatory

G. Meeus

Universidad Autonoma de Madrid (UAM)

P. Riviere-Marichalar

Centro de Astrobiologia (CAB)

C. Pinte

Université Grenoble Alpes

University of Exeter

C. D. Howard

NASA Ames Research Center

A. Roberge

NASA Goddard Space Flight Center

G. Sandell

NASA Ames Research Center

I. Pascucci

Space Telescope Science Institute (STScI)

B. Riaz

Space Telescope Science Institute (STScI)

C. A. Grady

NASA Goddard Space Flight Center

W. R. F. Dent

Atacama Large Millimeter-submillimeter Array (ALMA)

I. Kamp

Rijksuniversiteit Groningen

G. Duchene

Université Grenoble Alpes

University of California

J. C. Augereau

Université Grenoble Alpes

E. Pantin

Institut de Recherche sur les Lois Fondamentales de l'Univers

B. Vandenbussche

KU Leuven

I. Tilling

University of Edinburgh

J. P. Williams

University of Hawaii

C. Eiroa

Universidad Autonoma de Madrid (UAM)

D. Barrado

Calar Alto Astronomical Observatory

Centro de Astrobiologia (CAB)

J. M. Alacid

Centro de Astrobiologia (CAB)

Spanish Virtual Observatory

S. Andrews

Harvard-Smithsonian Center for Astrophysics

D. R. Ardila

California Institute of Technology (Caltech)

G. Aresu

Rijksuniversiteit Groningen

S. Brittain

Clemson University

D. R. Ciardi

National Aeronautics and Space Administration

W. Danchi

NASA Goddard Space Flight Center

D. Fedele

Max Planck-institutet

Universidad Autonoma de Madrid (UAM)

Johns Hopkins University

I. de Gregorio-Monsalvo

Atacama Large Millimeter-submillimeter Array (ALMA)

A. Heras

ESTEC

N. Huelamo

Royal Observatory

A. Krivov

Friedrich-Schiller-Universität Jena

J. Lebreton

Université Grenoble Alpes

René Liseau

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

C. Martin-Zaidi

Université Grenoble Alpes

I. Mendigutia

Royal Observatory

B. Montesinos

Royal Observatory

A. Mora

Chalmers

M. Morales-Calderon

European Space Astronomy Centre (ESA)

H. Nomura

Kyoto University

N. Phillips

University of Edinburgh

L. Podio

Rijksuniversiteit Groningen

D. R. Poelman

University of St Andrews

S. Ramsay

European Southern Observatory (ESO)

K. Rice

University of Edinburgh

E. Solano

Centro de Astrobiologia (CAB)

Spanish Virtual Observatory

H. Walker

Rutherford Appleton Laboratory

G. J. White

Open University

Rutherford Appleton Laboratory

G. Wright

Royal Observatory

Astronomy and Astrophysics

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

Vol. 518 Article Number: L125 L125

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201014578

Mer information

Senast uppdaterat

2018-09-10