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.
spectra
array
emission
circumstellar disks
protoplanetary disks
young stars
hydrae
models
main-sequence stars
x-ray
Författare
W. F. Thi
University of Edinburgh
Université Grenoble Alpes
G. Mathews
University of Hawaii
F. Menard
Université Grenoble Alpes
P. Woitke
University of Edinburgh
University of St Andrews
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
University of California
Université Grenoble Alpes
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
Spanish Virtual Observatory
Centro de Astrobiologia (CAB)
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 (NASA)
W. Danchi
NASA Goddard Space Flight Center
D. Fedele
Max-Planck-Gesellschaft
Johns Hopkins University
Universidad Autonoma de Madrid (UAM)
I. de Gregorio-Monsalvo
Atacama Large Millimeter-submillimeter Array (ALMA)
A. Heras
European Space Research and Technology Centre (ESA 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
M. Morales-Calderon
European Space Astronomy Centre (ESAC)
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
Spanish Virtual Observatory
Centro de Astrobiologia (CAB)
H. Walker
STFC Rutherford Appleton Laboratory
G. J. White
Open University
STFC Rutherford Appleton Laboratory
G. Wright
Royal Observatory
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 518 Article Number: L125 L125Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.1051/0004-6361/201014578