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Proceedings Paper

Disks around young stars with VLTI/MIDI
Author(s): Roy van Boekel; Péter Ábrahám; Serge Correia; Alex de Koter; Carsten Dominik; Anne Dutrey; Thomas Henning; Ágnes Kóspál; Régis Lachaume; Christoph Leinert; Hendrik Linz; Michiel Min; László Mosoni; Thomas Preibisch; Sascha Quanz; Thorsten Ratzka; Alexander Schegerer; Rens Waters; Sebastian Wolf; Hans Zinnecker
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Paper Abstract

We report on observations of circumstellar disks around young stars that have been obtained with the MIDI instrument, which is mounted on the VLT Interferometer and operates in the 10 μm atmospheric window. The maximum spatial resolution of 5 milli-arcsec corresponds to sub-AU scales at the distance to nearby star formation regions. Thus, we can study the disks on the spatial scales at which important processes occur, such as accretion, dust processing, and planet formation. The main results obtained so far can be summarized as follows: 1. The measured interferometric visibilities are in good qualitative agreement with those predicted by models of circumstellar disks. In particular, a predicted correlation between the strength of the far-infrared excess and the spatial structure of the disk is confirmed by direct measurements; 2. In several objects strong evidence for deviations from circular symmetry is present, indicating that an inclined disk is indeed the dominant component seen in the mid-infrared; 3. The dust properties are not uniform over the disk, but are instead a strong function of distance to the central star. The dust in the innermost disk regions is observed to be more "processed" than the dust further out, both in Herbig Ae star disks and in those around T Tauri stars.

Paper Details

Date Published: 27 June 2006
PDF: 19 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62680D (27 June 2006); doi: 10.1117/12.673777
Show Author Affiliations
Roy van Boekel, Max-Planck-Institut für Astronomie (Germany)
Péter Ábrahám, Konkoly Observatory (Hungary)
Serge Correia, Astrophysikalisches Institut (Germany)
Alex de Koter, Univ. of Amsterdam (Netherlands)
Carsten Dominik, Univ. of Amsterdam (Netherlands)
Anne Dutrey, Observatoire de Bordeaux (France)
Thomas Henning, Max-Planck-Institut für Astronomie (Germany)
Ágnes Kóspál, Konkoly Observatory (Hungary)
Régis Lachaume, CRyA UNAM (Mexico)
Christoph Leinert, Max-Planck-Institut für Astronomie (Germany)
Hendrik Linz, Max-Planck-Institut für Astronomie (Germany)
Michiel Min, Univ. of Amsterdam (Netherlands)
László Mosoni, Konkoly Observatory (Hungary)
Thomas Preibisch, Max-Planck-Institut für Radioastronomie (Germany)
Sascha Quanz, Max-Planck-Institut für Astronomie (Germany)
Thorsten Ratzka, Max-Planck-Institut für Astronomie (Germany)
Alexander Schegerer, Max-Planck-Institut für Astronomie (Germany)
Rens Waters, Univ. of Amsterdam (Netherlands)
Sebastian Wolf, Max-Planck-Institut für Astronomie (Germany)
Hans Zinnecker, Astrophysikalisches Institut (Germany)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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