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.
mass stars
evolution
circumstellar matter
accretion
radiative-transfer
line: formation
dust
protoplanetary disks
stars:
emission
disk structure
radiative transfer
continuum
formation
astrochemistry
Author
C. Pinte
Grenoble Alpes University
University of Exeter
P. Woitke
University of Edinburgh
Royal Observatory
University of St Andrews
F. Menard
Grenoble Alpes University
G. Duchene
Grenoble Alpes University
University of California
I. Kamp
University of Groningen
G. Meeus
Universidad Autonoma de Madrid (UAM)
G. Mathews
University of Hawaii
C. D. Howard
NASA Ames Research Center
C. A. Grady
NASA Goddard Space Flight Center
W. F. Thi
Grenoble Alpes University
University of Edinburgh
I. Tilling
University of Edinburgh
J. C. Augereau
Grenoble Alpes University
W. R. F. Dent
European Southern Observatory Santiago
Atacama Large Millimeter-submillimeter Array (ALMA)
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
University of Groningen
D. Barrado
Centro de Astrobiologia (CAB)
Calar Alto Astronomical Observatory
S. Brittain
Clemson University
D. R. Ciardi
California Institute of Technology (Caltech)
W. Danchi
NASA Goddard Space Flight Center
C. Eiroa
Universidad Autonoma de Madrid (UAM)
D. Fedele
Universidad Autonoma de Madrid (UAM)
Max Planck Society
Johns Hopkins University
I. de Gregorio-Monsalvo
European Southern Observatory Santiago
Atacama Large Millimeter-submillimeter Array (ALMA)
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
NASA Goddard Space Flight Center
G. Sandell
NASA Goddard Space Flight Center
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
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/201014591