Disks around young stars with VLTI/MIDI

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish
Title of host publicationAdvances in Stellar Interferometry
Publication statusPublished - Oct 2 2006
EventAdvances in Stellar Interferometry - Orlando, FL, United States
Duration: May 25 2006May 30 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6268 I
ISSN (Print)0277-786X


OtherAdvances in Stellar Interferometry
CountryUnited States
CityOrlando, FL


  • Circumstellar
  • Disk
  • Dust
  • Evolution
  • Infrared
  • Interferometry
  • Planet formation
  • Radiative transfer
  • Star formation
  • YSO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Van Boekel, R., Ábrahám, P., Correia, S., De Koter, A., Dominik, C., Dutrey, A., Henning, T., Kóspál, Á., Lachaume, R., Leinert, C., Linz, H., Min, M., Mosoni, L., Preibisch, T., Quanz, S., Ratzka, T., Schegerer, A., Waters, R., Wolf, S., & Zinnecker, H. (2006). Disks around young stars with VLTI/MIDI. In Advances in Stellar Interferometry [62680D] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6268 I). https://doi.org/10.1117/12.673777