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The Herschel view of GAS in Protoplanetary Systems (GASPS): First comparisons with a large grid of models

Pinte, C. and Ciardi, D. R. and Morales-Calderón, M. (2010) The Herschel view of GAS in Protoplanetary Systems (GASPS): First comparisons with a large grid of models. Astronomy and Astrophysics, 518 . Art. No. L126. ISSN 0004-6361.

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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 ≈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.

Item Type:Article
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URLURL TypeDescription
Pinte, C.0000-0001-5907-5179
Ciardi, D. R.0000-0002-5741-3047
Additional Information:© 2010 ESO. Received 30 March 2010; Accepted 5 May 2010; Published online 16 July 2010. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. C. Pinte acknowledges funding from the European Commission’s 7th Framework Program as a Marie Curie Intra-European Fellow (PIEF-GA-2008-220891). The members of LAOG, Grenoble acknowledge PNPS, CNES and ANR (contract ANR-07-BLAN-0221) for financial support. W.F. Thi acknowledges a SUPA astrobiology fellowship. G. Meeus, C. Eiroa, I. Mendigutía and B. Montesinos are partly supported by Spanish grant AYA 2008-01727. D.R. Ardila, S.D. Brittain, W. Danchi, C.A. Grady, C.D. Howard, G.S.Mathews, I. Pascucci, A. Roberge, B. Riaz, G. Sandell and J.P.Williams acknowledge NASA/JPL for funding support. J.M. Alcid and E. Solano acknowledges funding from the Spanish MICINN (grant AYA2008-02156).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Marie Curie FellowshipPIEF-GA-2008-220891
Programme National de Physique Stellaire (PNPS)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Agence National de la Recherche (ANR)ANR-07-BLAN-0221
Scottish Universities Physics AllianceUNSPECIFIED
Ministerio de Ciencia e Innovación (MICINN)AYA 2008-01727
Ministerio de Ciencia e Innovación (MICINN)AYA2008-02156
Subject Keywords:astrochemistry; circumstellar matter; protoplanetary disks; stars: formation; radiative transfer; line: formation
Record Number:CaltechAUTHORS:20101123-111942826
Persistent URL:
Official Citation:The Herschel view of GAS in Protoplanetary Systems (GASPS) - First comparisons with a large grid of models C. Pinte, P. Woitke, F. Ménard, G. Duchêne, I. Kamp, G. Meeus, G. Mathews, C. D. Howard, C. A. Grady, W.-F. Thi, I. Tilling, J.-C. Augereau, W. R. F. Dent, J. M. Alacid, S. Andrews, D. R. Ardila, G. Aresu, D. Barrado, S. Brittain, D. R. Ciardi, W. Danchi, C. Eiroa, D. Fedele, I. de Gregorio-Monsalvo, A. Heras, N. Huelamo, A. Krivov, J. Lebreton, R. Liseau, C. Martin-Zaïdi, I. Mendigutía, B. Montesinos, A. Mora, M. Morales-Calderon, H. Nomura, E. Pantin, I. Pascucci, N. Phillips, L. Podio, D. R. Poelman, S. Ramsay, B. Riaz, K. Rice, P. Riviere-Marichalar, A. Roberge, G. Sandell, E. Solano, B. Vandenbussche, H. Walker, J. P. Williams, G. J. White and G. Wright A&A 518 L126 (2010) DOI: 10.1051/0004-6361/201014591
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20984
Deposited By: Jason Perez
Deposited On:01 Dec 2010 16:30
Last Modified:01 Nov 2019 17:04

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