Published 2004
| Version v1
Journal article
Mid-infrared sizes of circumstellar disks around Herbig Ae/Be stars measured with MIDI on the VLTI
Creators
- Leinert, Ch.
- van Boekel, R.
- Waters, L.B.F.M.
- Chesneau, O.
- Malbet, Fabien
- Köhler, R.
- Jaffe, W.
- Ratzka, Th.
- Dutrey, Anne
- Preibish, Th.
- Graser, U.
- Bakker, E.
- Chagnon, Gilles
- Cotton, W.D.
- Dominik, C.
- Dullemond, C.P
- Glazenborg-Kluttig, A.W.
- Glindemann, A.
- Henning, Th
- Hofmann, Karl-Heinz
- de Jong, J.
- Lenzen, Rainer
- Ligori, Sebastiano
- Lopez, B.
- Meisner, J.
- Morel, S.
- Paresce, Francesco
- Pel, Jan-Willem
- Percheron, I.
- Perrin, G.
- Przygodda, F.
- Richichi, A.
- Schöller, Marcus
- Schuller, P.
- Stecklum, Bringfried
- van den Ancker, Mario E.
- von Der Lühe, O.
- Weigelt, Gerd
Contributors
Others:
- Max-Planck-Institut für Astronomie (MPIA) ; Max-Planck-Gesellschaft
- Instituut voor Sterrenkunde [Leuven] ; Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven)
- Laboratoire d'Astrophysique de Grenoble (LAOG) ; Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
- Sterrewacht Leiden ; Universiteit Leiden [Leiden]
- Observatoire des Sciences de l'Univers de Grenoble (OSUG) ; Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)
- Max-Planck-Institut für Radioastronomie (MPIFR)
- Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA) ; Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
- National Radio Astronomy Observatory [Charlottesville] (NRAO) ; National Radio Astronomy Observatory (NRAO)
- Astronomical Institute Anton Pannekoek (AI PANNEKOEK) ; University of Amsterdam [Amsterdam] (UvA)
- Netherlands Institute for Radio Astronomy (ASTRON)
- European Southern Observatory (ESO)
- Darmstadt University of Technology [Darmstadt]
- Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)
- Kapteyn Astronomical Institute [Groningen] ; University of Groningen [Groningen]
- Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
- Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
- Thüringer Landessternwarte Tautenburg (TLS)
Description
We present the first long baseline mid-infrared interferometric observations of the circumstellar disks surrounding Herbig Ae/Be stars. The observations were obtained using the mid-infrared interferometric instrument MIDI at the EuropeanSouthern Observatory (ESO) Very Large Telescope Interferometer VLTI on Cerro Paranal. The 102 m baseline given by thetelescopes UT1 and UT3 was employed, which provides a maximum full spatial resolution of 20 milli-arcsec (mas) at a wave-length of 10 µm. The interferometric signal was spectrally dispersed at a resolution of 30, giving spectrally resolved visibility information from 8 µm to 13.5 µm. We observed seven nearby Herbig Ae/Be stars and resolved all objects. The warm dust disk of HD 100546 could even be resolved in single-telescope imaging. Characteristic dimensions of the emitting regions at 10 µm are found to be from 1 AU to 10 AU. The 10 µm sizes of our sample stars correlate with the slope of the 10–25 µm infrared spectrum in the sense that the reddest objects are the largest ones. Such a correlation would be consistent with a different geometry in terms of flaring or flat (self-shadowed) disks for sources with strong or moderate mid-infrared excess, respectively. We compare the observed spectrally resolved visibilities with predictions based on existing models of passive centrally irradiated hydrostatic disks made to fit the SEDs of the observed stars. We find broad qualitative agreement of the spectral shape of visibilities corresponding to these models with our observations. Quantitatively, there are discrepancies that show the need for a next step in modelling of circumstellar disks, satisfying both the spatial constraints such as are now available from the MIDI observations and the flux constraints from the SEDs in a consistent way.
Abstract
Astronomy and Astrophysics, v. 423, p. 537-548, 2004. http://dx.doi.org/10.1051/0004-6361:20047178Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.archives-ouvertes.fr/hal-00419009
- URN
- urn:oai:HAL:hal-00419009v1
Origin repository
- Origin repository
- UNICA