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Gas and dust in the TW Hydrae association as seen by the Herschel Space Observatory

Rivière-Marichalar, P. and Pinte, C. and Barrado y Navascués, D. and Thi, W. F. and Eiroa, C. and Kamp, I. and Montesinos, B. and Donaldson, J. and Augereau, J. C. and Huélamo, N. and Roberge, A. and Ardila, D. and Sandell, G. and Williams, J. P. and Dent, W. R. F. and Ménard, F. and Lillo-Box, J. and Duchêne, G. (2013) Gas and dust in the TW Hydrae association as seen by the Herschel Space Observatory. Astronomy and Astrophysics, 555 . Art. No. A67. ISSN 0004-6361. doi:10.1051/0004-6361/201321506.

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Context. Circumstellar discs are the places where planets form, therefore knowledge of their evolution is crucial for our understanding of planet formation. The Herschel Space Observatory is providing valuable data for studying disc systems, thanks to its sensitivity and wavelength coverage. This paper is one of several devoted to analysing and modelling Herschel-PACS observations of various young stellar associations from the GASPS open time key programme. Aims. The aim of this paper is to elucidate the gas and dust properties of circumstellar discs in the ~10 Myr TW Hya association (TWA) using new far-infrared (IR) imaging and spectroscopy from Herschel-PACS. Methods. We obtained far-IR photometric data at 70, 100, and 160 μm of 14 TWA members; spectroscopic observations centred on the [OI] line at 63.18 μm were also obtained for 9 of the 14. The new photometry for each star was incorporated into its full spectral energy distribution. Results. We detected excess IR emission that is characteristic of circumstellar discs from five TWA members, and computed upper limits for another nine. Two TWA members (TWA 01 and TWA 04B) also show [OI] emission at 63.18 μm. Discs in the TWA association display a variety of properties, with a wide range of dust masses and inner radii, based on modified blackbody modelling. Both transitional and debris discs are found in the sample. Models for sources with a detected IR excess give dust masses in the range from ~0.15 M_⊕ to ~63 M_⊕

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Pinte, C.0000-0001-5907-5179
Huélamo, N.0000-0002-2711-8143
Williams, J. P.0000-0001-5058-695X
Additional Information:© 2013 ESO. Article published by EDP Sciences. Received 19 March 2013; accepted 10 May 2013. This research has been funded by Spanish grants AYA 2010-21161-C02-02, AYA2012-38897-C02-01, AYA2011-26202 CDS2006-00070, and PRICIT-S2009/ESP-1496. We also acknowledge support from ANR (contract ANR-07-BLAN-0221) and PNPS of CNRS/INSU, France. C. Pinte acknowledges funding from the European Commission’s 7th Framework programme (contract PERG06-GA-2009-256513) and from Agence Nationale pour la Recherche (ANR) of France under contract ANR-2010-JCJC-0504-01. W.F.T. thanks the CNES for a post-doctoral position.W.F.T., F.M. and I.K. acknowledge funding from the EU FP7-2011 under Grant Agreement nr. 284405 (DIANA project). J.C.A. acknowledges the PNP-CNES for financial support. F.M. acknowledge support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant “Nucleus P10-022-F”. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA.
Funding AgencyGrant Number
Ministerio de Ciencia e Innovación (MCINN)AYA 2010-21161-C02-02
Ministerio de Ciencia e Innovación (MCINN)AYA2012-38897-C02-01
Ministerio de Ciencia e Innovación (MCINN)AYA2011-26202 CDS2006- 00070
Ministerio de Ciencia e Innovación (MCINN)PRICIT-S2009/ESP-1496
Agence Nationale pour la Recherche (ANR)ANR-07-BLAN-0221
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Marie Curie FellowshipPERG06-GA-2009-256513
Centre National d'Études Spatiales (CNES)UNSPECIFIED
European Research Council (ERC)284405
Programme National Galaxies et Cosmologie (PNCG)UNSPECIFIED
Chilean Ministry of Economy Millennium Science InitiativeNucleus P10-022-F
Institut national des sciences de l'Univers (INSU)UNSPECIFIED
Subject Keywords:stars: formation; astrochemistry; protoplanetary disks; circumstellar matter; zodiacal dust; planetary systems
Record Number:CaltechAUTHORS:20130925-111637537
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Official Citation:Gas and dust in the TW Hydrae association as seen by the Herschel Space Observatory P. Riviere-Marichalar, C. Pinte, D. Barrado, W. F. Thi, C. Eiroa, I. Kamp, B. Montesinos, J. Donaldson, J. C. Augereau, N. Huélamo, A. Roberge, D. Ardila, G. Sandell, J. P. Williams, W. R. F. Dent, F. Menard, J. Lillo-Box and G. Duchêne A&A 555 A67 (2013) DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41523
Deposited On:25 Sep 2013 22:46
Last Modified:10 Nov 2021 04:31

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