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The VLTi/PIONIER survey of southern TTauri disks

Published online by Cambridge University Press:  06 January 2014

Fabien Anthonioz
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
F. Ménard
Affiliation:
UMI-FCA, CNRS/INSU, France (UMI 3386), and Universidad de Chile, Santiago, Chile.
C. Pinte
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
W-F. Thi
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
J.-B. Lebouquin
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
J.-P. Berger
Affiliation:
European Southern Observatory, 85748 Garching, Germany.
M. Benisty
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
O. Absil
Affiliation:
Institut d'Astrophysique et de Géophysique, Université de Liège, Sart Tilman, Belgium.
G. Duchène
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr Astronomy Department, University of California, Berkeley, CA 94720-3411USA.
B. Lazareff
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
F. Malbet
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
R. Millan-Gabet
Affiliation:
California Institute of Technology, Pasadena, CA 91125, USA.
W. Traub
Affiliation:
Jet Propulsion Laboratory (NASA/JPL), Pasadena, CA, 91109, USA.
G. Zins
Affiliation:
Institut de Planétologie et d'Astrophysique de Grenoble, 38400 St Martin d'Hères, France. email: Fabien.Anthonioz@obs.ujf-grenoble.fr
Corresponding
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Abstract

Studying the inner regions of protoplanetary disks (1-10 AU) is of importance to understand the formation of planets and the accretion process feeding the forming central star. Herbig AeBe stars are bright enough to be routinely observed by Near IR interferometers. The data for the fainter T Tauri stars is much more sparse. In this contribution we present the results of our ongoing survey at the VLTI. We used the PIONIER combiner that allows the simultaneous use of 4 telescopes, yielding 6 baselines and 3 independent closure phases at once. PIONIER's integrated optics technology makes it a sensitive instrument. We have observed 22 T Tauri stars so far, the largest survey for T Tauri stars to this date.

Our results demonstrate the very significant contribution of an extended component to the interferometric signal. The extended component is different from source to source and the data, with several baselines, offer a way to improve our knowledge of the disk geometry and/or composition. These results validate an earlier study by Pinte et al. 2008 and show that the dust inner radii of T Tauri disks now appear to be in better agreement with the expected position of the dust sublimation radius, contrary to previous claims.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013 

Footnotes

Data obtained at the ESO VLTI as part of programmes 086. C-0433, 087. C-0703, 088. C-0670, 089. C-0769 and 091.C-0570.

References

Pinte, C., Ménard, F., Berger, J. P. & Benisty, M. 2008, APJ, 663, L63CrossRefGoogle Scholar
Pinte, C., Ménard, F., Duchêne, G. & Bastien, P. 2006, AAP, 459, 797CrossRefGoogle Scholar
Lebouquin, J.-B.et al. 2011, AAP, 535, 67CrossRefGoogle Scholar
Draine, B.-T. & Hyung Mok Lee, 1984, AAP, 285, 89Google Scholar
Eisner, J.-A., Hillenbrand, L.-A., White, R.-J., Bloom, J.-S., Akeson, R.-L., & Blake, C.-H. 1984, AAP, 669, 1072Google Scholar
Haguenauer, P. 2003, in: Alonso, J.et al. (eds.), The very large telescope Interferometer: 2010 edition, Proc. Society of Photo-Optical Instrumentation Engineers (SPIE), vol 7734Google Scholar
Ghez, A.-M., White, R.-J. and Simon, M. 1997, AAP, 490, 353Google Scholar
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