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Gas in the protoplanetary disc of HD169142: Herschel’s view

Meeus, G. and Ciardi, D. R. and Morales-Calderon, M. (2010) Gas in the protoplanetary disc of HD169142: Herschel’s view. Astronomy and Astrophysics, 518 . Art. No. L124. ISSN 0004-6361.

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In an effort to simultaneously study the gas and dust components of the disc surrounding the young Herbig Ae star HD169142, we present far-IR observations obtained with the PACS instrument onboard the Herschel Space Observatory. This work is part of the open time key program GASPS, which is aimed at studying the evolution of protoplanetary discs. To constrain the gas properties in the outer disc, we observed the star at several key gas-lines, including [OI] 63.2 and 145.5 μm, [CII] 157.7 μm, CO 72.8 and 90.2 μm, and o-H_2O 78.7 and 179.5 μm. We only detect the [OI] 63.2 μm line in our spectra, and derive upper limits for the other lines. We complement our data set with PACS photometry and ^(12/13)CO data obtained with the Submillimeter Array. Furthermore, we derive accurate stellar parameters from optical spectra and UV to mm photometry. We model the dust continuum with the 3D radiative transfer code MCFOST and use this model as an input to analyse the gas lines with the thermochemical code ProDiMo. Our dataset is consistent with a simple model in which the gas and dust are well-mixed in a disc with a continuous structure between 20 and 200 AU, but this is not a unique solution. Our modelling effort allows us to constrain the gas-to-dust mass ratio as well as the relative abundance of the PAHs in the disc by simultaneously fitting the lines of several species that originate in different regions. Our results are inconsistent with a gas-poor disc with a large UV excess; a gas mass of 5.0 ± 2.0 × 10^(−3)M_⊙ is still present in this disc, in agreement with earlier CO observations.

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Ciardi, D. R.0000-0002-5741-3047
Additional Information:© 2010 ESO. Received 30 March 2010, Accepted 12 April 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. We thank the PACS instrument team for their dedicated support, O. Panic for a discussion on her data and A. Juhász for providing the Spitzer/IRS data. C. Eiroa, G. Meeus, I. Mendigutía and B. Montesinos are partly supported by AYA 2008-01727; J. M. Alacid and E. Solano by AYA 2008-02156 and I. d. Gregorio by AYA 2008-06189 (Spanish grants). C. Pinte acknowledges funding from the EC 7${\rm th}$ FP as a Marie Curie Intra-European Fellow (PIEF-GA-2008-220891). J.-C. Augereau, G. Duchêne, J. Lebreton, C. Martin-Zaidi, F. Ménard and C. Pinte acknowledge PNPS, CNES and ANR (contract ANR-07-BLAN-0221) for financial support. D. R. Ardila, S. D. Brittain, B. Danchi, C. A. Grady, I. Pascucci, B. Riaz, A. Roberge, G. Sandell and C. D. Howards acknowledge NASA/JPL for funding support. PACS has been developed by a consortium of institutes led by MPE (Germany) and including UVIE (Austria); KUL, CSL, IMEC (Belgium); CEA, OAMP (France); MPIA (Germany); IFSI, OAP/AOT, OAA/CAISMI, LENS, SISSA (Italy); IAC (Spain). This development has been supported by the funding agencies BMVIT (Austria), ESA-PRODEX (Belgium), CEA/CNES (France), DLR (Germany), ASI (Italy), and CICT/MCT (Spain).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
EC 7th Framework ProgramPIEF-GA-2008-220891
Programme National de Physique Stellaire (PNPS)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Agence Nationale pour la Recherche (ANR)UNSPECIFIED
Bundesministerium für Verkehr, Innovation und Technologie (BMVIT)UNSPECIFIED
European Space Agency (ESA) PROgramme for the Development of scientific EXperiments (PRODEX) (Belgium)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Deutschland für Luft- und Raumfahrt (DLR)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Comisión Interministerial de Ciencia y Tecnología (CICYT)UNSPECIFIED
Ministerio de Ciencia Y Tecnologia (MCYT)UNSPECIFIED
Subject Keywords:planetary systems, circumstellar matter, stars: pre-main sequence, protoplanetary disks, infrared: planetary systems
Record Number:CaltechAUTHORS:20101202-115913503
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Official Citation:Gas in the protoplanetary disc of HD 169142: Herschel's view G. Meeus, C. Pinte, P. Woitke, B. Montesinos, I. Mendigutía, P. Riviere-Marichalar, C. Eiroa, G. S. Mathews, B. Vandenbussche, C. D. Howard, A. Roberge, G. Sandell, G. Duchêne, F. Ménard, C. A. Grady, W. R. F. Dent, I. Kamp, J. C. Augereau, W. F. Thi, I. Tilling, J. M. Alacid, S. Andrews, D. R. Ardila, G. Aresu, D. Barrado, S. Brittain, D. R. Ciardi, W. Danchi, D. Fedele, I. de Gregorio-Monsalvo, A. Heras, N. Huelamo, A. Krivov, J. Lebreton, R. Liseau, C. Martin-Zaidi, A. Mora, M. Morales-Calderon, H. Nomura, E. Pantin, I. Pascucci, N. Phillips, L. Podio, D. R. Poelman, S. Ramsay, B. Riaz, K. Rice, E. Solano, H. Walker, G. J. White, J. P. Williams and G. Wright A&A 518 L124 (2010) DOI: 10.1051/0004-6361/201014557
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21129
Deposited By: Benjamin Perez
Deposited On:02 Dec 2010 22:06
Last Modified:03 Oct 2019 02:20

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