The Herschel view of GAS in Protoplanetary Systems (GASPS) First comparisons with a large grid of models
Journal article, 2010
The Herschel GASPS key program is a survey of the gas phase of protoplanetary discs, targeting 240 objects which cover a large range of ages, spectral types, and disc properties. To interpret this large quantity of data and initiate self-consistent analyses of the gas and dust properties of protoplanetary discs, we have combined the capabilities of the radiative transfer code MCFOST with the gas thermal balance and chemistry code ProDiMo to compute a grid of approximate to 300 000 disc models (DENT). We present a comparison of the first Herschel/GASPS line and continuum data with the predictions from the DENT grid of models. Our objective is to test some of the main trends already identified in the DENT grid, as well as to define better empirical diagnostics to estimate the total gas mass of protoplanetary discs. Photospheric UV radiation appears to be the dominant gas-heating mechanism for Herbig stars, whereas UV excess and/or X-rays emission dominates for T Tauri stars. The DENT grid reveals the complexity in the analysis of far-IR lines and the difficulty to invert these observations into physical quantities. The combination of Herschel line observations with continuum data and/or with rotational lines in the (sub-)millimetre regime, in particular CO lines, is required for a detailed characterisation of the physical and chemical properties of circumstellar discs.
stars:
circumstellar matter
dust
emission
line: formation
evolution
radiative transfer
accretion
continuum
formation
radiative-transfer
disk structure
protoplanetary disks
astrochemistry
mass stars
Author
C. Pinte
University of Exeter
Grenoble Alpes University
P. Woitke
University of St Andrews
University of Edinburgh
Royal Observatory
F. Menard
Grenoble Alpes University
G. Duchene
University of California
Grenoble Alpes University
I. Kamp
University of Groningen
G. Meeus
Universidad Autonoma de Madrid (UAM)
G. Mathews
University of Hawaii
C. D. Howard
National Aeronautics and Space Administration (NASA)
C. A. Grady
National Aeronautics and Space Administration (NASA)
W. F. Thi
Grenoble Alpes University
University of Edinburgh
I. Tilling
University of Edinburgh
J. C. Augereau
Grenoble Alpes University
W. R. F. Dent
Atacama Large Millimeter-submillimeter Array (ALMA)
European Southern Observatory Santiago
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
University of Groningen
D. Barrado
Calar Alto Astronomical Observatory
Centro de Astrobiologia (CAB)
S. Brittain
Clemson University
D. R. Ciardi
California Institute of Technology (Caltech)
W. Danchi
National Aeronautics and Space Administration (NASA)
C. Eiroa
Universidad Autonoma de Madrid (UAM)
D. Fedele
Max Planck Society
Universidad Autonoma de Madrid (UAM)
Johns Hopkins University
I. de Gregorio-Monsalvo
Atacama Large Millimeter-submillimeter Array (ALMA)
European Southern Observatory Santiago
A. Heras
European Space Research and Technology Centre (ESA ESTEC)
N. Huelamo
Centro de Astrobiologia (CAB)
A. Krivov
Friedrich Schiller University Jena
J. Lebreton
Grenoble Alpes University
René Liseau
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
C. Martin-Zaidi
Grenoble Alpes University
I. Mendigutia
Centro de Astrobiologia (CAB)
B. Montesinos
Centro de Astrobiologia (CAB)
A. Mora
European Space Astronomy Centre (ESAC)
M. Morales-Calderon
Spitzer Science Center
H. Nomura
Kyoto University
E. Pantin
Astrophysique, Instrumentation et Modelisation de Paris-Saclay
I. Pascucci
Space Telescope Science Institute (STScI)
N. Phillips
University of Edinburgh
L. Podio
University of Groningen
D. R. Poelman
University of St Andrews
S. Ramsay
European Southern Observatory (ESO)
B. Riaz
Space Telescope Science Institute (STScI)
K. Rice
University of Edinburgh
P. Riviere-Marichalar
Centro de Astrobiologia (CAB)
A. Roberge
National Aeronautics and Space Administration (NASA)
G. Sandell
National Aeronautics and Space Administration (NASA)
E. Solano
European Southern Observatory Santiago
Atacama Large Millimeter-submillimeter Array (ALMA)
B. Vandenbussche
KU Leuven
H. Walker
STFC Rutherford Appleton Laboratory
J. P. Williams
University of Hawaii
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: L126 L126Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/201014591