The Herschel view of GAS in Protoplanetary Systems (GASPS) First comparisons with a large grid of models
Artikel i vetenskaplig tidskrift, 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.

accretion

evolution

emission

dust

circumstellar matter

radiative-transfer

mass stars

protoplanetary disks

line: formation

continuum

stars:

radiative transfer

formation

astrochemistry

disk structure

Författare

C. Pinte

University of Exeter

Université Grenoble Alpes

P. Woitke

Royal Observatory

University of St Andrews

University of Edinburgh

F. Menard

Université Grenoble Alpes

G. Duchene

Université Grenoble Alpes

University of California

I. Kamp

Rijksuniversiteit 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

University of Edinburgh

Université Grenoble Alpes

I. Tilling

University of Edinburgh

J. C. Augereau

Université Grenoble Alpes

W. R. F. Dent

Atacama Large Millimeter-submillimeter Array (ALMA)

European Southern Observatory Santiago

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

D. Barrado

Centro de Astrobiologia (CAB)

Calar Alto Astronomical Observatory

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-Gesellschaft

Johns Hopkins University

Universidad Autonoma de Madrid (UAM)

I. de Gregorio-Monsalvo

European Southern Observatory Santiago

Atacama Large Millimeter-submillimeter Array (ALMA)

A. Heras

Europeiska rymdorganisationen (ESA)

N. Huelamo

Centro de Astrobiologia (CAB)

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

Centro de Astrobiologia (CAB)

B. Montesinos

Centro de Astrobiologia (CAB)

A. Mora

Europeiska rymdorganisationen (ESA)

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

Rijksuniversiteit 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

Atacama Large Millimeter-submillimeter Array (ALMA)

European Southern Observatory Santiago

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 L126

Ämneskategorier (SSIF 2011)

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201014591

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Senast uppdaterat

2025-04-23