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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 225866.0, MPI für Astronomie / Publikationen_mpia
Mid-infrared sizes of circumstellar disks
around Herbig Ae/Be stars measured with MIDI on
the VLTI
Authors:Leinert, Ch.; van Boekel, R.; Waters, L. B. F. M.; Chesneau, O.; Malbet, F.; Köhler, R.; Jaffe, W.; Ratzka, Th.; Dutrey, A.; Preibisch, Th.; Graser, U.; Bakker, E.; Chagnon, G.; Cotton, W. D.; Dominik, C.; Dullemond, C. P.; Glazenborg-Kluttig, A. W.; Glindemann, A.; Henning, Th.; Hofmann, K.-H.; de Jong, J.; Lenzen, R.; Ligori, S.; Lopez, B.; Meisner, J.; Morel, S.; Paresce, F.; Pel, J.-W.; Percheron, I.; Perrin, G.; Przygodda, F.; Richichi, A.; Schöller, M.; Schuller, P.; Stecklum, B.; van den Ancker, M. E.; von der Lühe, O.; Weigelt, G.
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Astronomy and Astrophysics
Volume:423
Start Page:537
End Page:548
Review Status:not specified
Audience:Not Specified
Abstract / 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 European Southern Observatory (ESO) Very
Large Telescope Interferometer VLTI on Cerro
Paranal. The 102 m baseline given by the
telescopes UT1 and UT3 was employed, which
provides a maximum full spatial resolution of 20
milli-arcsec (mas) at a wavelength of 10 ‚‚mu;m.
The interferometric signal was spectrally
dispersed at a resolution of 30, giving
spectrally resolved visibility information from
8 ‚‚mu;m to 13.5 ‚‚mu;m. 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 ‚‚mu;m are found to be from 1 AU to
10 AU. The 10 ‚‚mu;m sizes of our sample stars
correlate with the slope of the 10-25 ‚‚mu;m
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.
Free Keywords:stars: circumstellar matter; techniques:
; interferometric; stars: formation; stars:
; pre-main-sequence; infrared: stars
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:K‚‚ouml;nigstuhl 17, 69117 Heidelberg, Germany
<EMAIL>leinert@mpia-hd.mpg.de</EMAIL>),
AB(Sterrenkundig Instituut ``Anton Pannekoek'',
Kruislaan 403, 1098 SJ Amsterdam, The
Netherlands), AC(Sterrenkundig Instituut ``Anton
Pannekoek'', Kruislaan 403, 1098 SJ Amsterdam,
The Netherlands; Instituut voor Sterrenkunde,
Celestijnenlaan 200B, 3001 Leuven, Belgium),
AD(Max-Planck-Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, 69117 Heidelberg, Germany),
AE(Laboratoire d'Astrophysique, Observatoire de
Grenoble, BP 53, 38041 Grenoble Cedex 9, France),
AF(Max-Planck-Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, 69117 Heidelberg, Germany),
AG(Sterrewacht Leiden, Niels-Bohr-Weg 2, 2300 RA
Leiden, The Netherlands), AH(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AI(Laboratoire
d'Astrophysique, Observatoire de Grenoble, BP 53,
38041 Grenoble Cedex 9, France),
AJ(Max-Planck-Institut f‚‚uuml;r Radioastronomie,
Auf dem H‚‚uuml;gel 69, 53121 Bonn, Germany),
AK(Max-Planck-Institut f‚‚uuml;r Astronomie,
K‚‚ouml;nigstuhl 17, 69117 Heidelberg, Germany),
AL(Sterrewacht Leiden, Niels-Bohr-Weg 2, 2300 RA
Leiden, The Netherlands), AM(Laboratoire
d'‚‚Eacute;tudes Spatiales et d'Instrumentation
en Astrophysique, Observatoire de Meudon, 5 place
Jules Janssen, 92190 Meudon, France), AN(National
Radio Astronomy Observatory, 520 Edgemont Road,
Charlottesville, VA 22903-2475, USA),
AO(Sterrenkundig Instituut ``Anton Pannekoek'',
Kruislaan 403, 1098 SJ Amsterdam, The
Netherlands), AP(Max-Planck-Institut f‚‚uuml;r
Astrophysik, Karl-Scharzschild-Stra‚‚szlig;e 1,
85741 Garching, Germany), AQ(ASTRON, Oude
Hoogeveesnsedijk 4, PO Box 2, 7990 AA Dwingeloo,
The Netherlands), AR(European Southern
Observatory, Karl-Schwarzschild-Strasse 2, 85748
Garching, Germany), AS(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AT(Max-Planck-Institut
f‚‚uuml;r Radioastronomie, Auf dem H‚‚uuml;gel
69, 53121 Bonn, Germany), AU(Sterrewacht Leiden,
Niels-Bohr-Weg 2, 2300 RA Leiden, The
Netherlands), AV(Max-Planck-Institut f‚‚uuml;r
Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AW(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), AX(Observatoire de la
C‚‚ocirc;te d'Azur, Boulevard de l'Observatoire,
BP 4229, 06304 Nice Cedex 4, France),
AY(Sterrewacht Leiden, Niels-Bohr-Weg 2, 2300 RA
Leiden, The Netherlands), AZ(European Southern
Observatory, Karl-Schwarzschild-Strasse 2, 85748
Garching, Germany), BA(European Southern
Observatory, Karl-Schwarzschild-Strasse 2, 85748
Garching, Germany), BB(Kapteyn Institute,
Landleven 12, Postbus 800, 9700 AV Groningen, The
Netherlands), BC(European Southern Observatory,
Karl-Schwarzschild-Strasse 2, 85748 Garching,
Germany), BD(Laboratoire d'‚‚Eacute;tudes
Spatiales et d'Instrumentation en Astrophysique,
Observatoire de Meudon, 5 place Jules Janssen,
92190 Meudon, France), BE(Max-Planck-Institut
f‚‚uuml;r Astronomie, K‚‚ouml;nigstuhl 17, 69117
Heidelberg, Germany), BF(European Southern
Observatory, Karl-Schwarzschild-Strasse 2, 85748
Garching, Germany), BG(European Southern
Observatory, Karl-Schwarzschild-Strasse 2, 85748
Garching, Germany), BH(Harvard-Smithonian Center
for Astrophysics, 60 Garden Street, Cambridge, MA
02138, USA), BI(Th‚‚uuml;ringer Landessternwarte
Tautenburg, Sternwarte 5, 07778 Tautenburg,
Germany), BJ(Sterrenkundig Instituut ``Anton
Pannekoek'', Kruislaan 403, 1098 SJ Amsterdam,
The Netherlands), BK(Kiepenheuer-Institut
f‚‚uuml;r Sonnenforschung, Sch‚‚ouml;neckstr.6,
79104 Freiburg, Germany), BL(Max-Planck-Institut
f‚‚uuml;r Radioastronomie, Auf dem H‚‚uuml;gel
69, 53121 Bonn, Germany)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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