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.

stars:

dust

continuum

formation

evolution

mass stars

radiative-transfer

disk structure

astrochemistry

protoplanetary disks

emission

circumstellar matter

line: formation

radiative transfer

accretion

Författare

C. Pinte

University of Exeter

Université Grenoble Alpes

P. Woitke

University of St Andrews

Royal Observatory

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 at Manoa

C. D. Howard

NASA Ames Research Center

C. A. Grady

NASA Goddard Space Flight Center

W. F. Thi

Université Grenoble Alpes

University of Edinburgh

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

Spanish Virtual Observatory

Centro de Astrobiologia (CAB)

S. Andrews

Harvard-Smithsonian Center for Astrophysics

D. R. Ardila

CalTech

G. Aresu

Rijksuniversiteit Groningen

D. Barrado

Calar Alto Astronomical Observatory

Centro de Astrobiologia (CAB)

S. Brittain

Clemson University

D. R. Ciardi

NASA Exoplanet Science Institute/Caltech

W. Danchi

NASA Goddard Space Flight Center

C. Eiroa

Universidad Autonoma de Madrid (UAM)

D. Fedele

Johns Hopkins University

Universidad Autonoma de Madrid (UAM)

Max Planck-institutet

I. de Gregorio-Monsalvo

Atacama Large Millimeter-submillimeter Array (ALMA)

European Southern Observatory Santiago

A. Heras

Res./Sci. Support Dept. of ESA/ESTEC

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

European Space Astronomy Centre (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

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

Rutherford Appleton Laboratory

J. P. Williams

University of Hawaii at Manoa

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: L126 L126

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201014591