VLTI/MIDI atlas of disks around low- and intermediate-mass young stellar objects

J. Varga, P. Ábrahám, L. Chen, Th Ratzka, K. Gabányi, Kóspál, A. Matter, R. Van Boekel, Th Henning, W. Jaffe, A. Juhász, B. Lopez, J. Menu, A. Moór, L. Mosoni, N. Sipos

Research output: Article

5 Citations (Scopus)

Abstract

Context. Protoplanetary disks show large diversity regarding their morphology and dust composition. With mid-infrared interferometry the thermal emission of disks can be spatially resolved, and the distribution and properties of the dust within can be studied. Aims. Our aim is to perform a statistical analysis on a large sample of 82 disks around low- and intermediate-mass young stars, based on mid-infrared interferometric observations. We intend to study the distribution of disk sizes, variability, and the silicate dust mineralogy. Methods. Archival mid-infrared interferometric data from the MIDI instrument on the Very Large Telescope Interferometer are homogeneously reduced and calibrated. Geometric disk models are used to fit the observations to get spatial information about the disks. An automatic spectral decomposition pipeline is applied to analyze the shape of the silicate feature. Results. We present the resulting data products in the form of an atlas, containing N band correlated and total spectra, visibilities, and differential phases. The majority of our data can be well fitted with a continuous disk model, except for a few objects, where a gapped model gives a better match. From the mid-infrared size-luminosity relation we find that disks around T Tauri stars are generally colder and more extended with respect to the stellar luminosity than disks around Herbig Ae stars. We find that in the innermost part of the disks (r 1 au) the silicate feature is generally weaker than in the outer parts, suggesting that in the inner parts the dust is substantially more processed. We analyze stellar multiplicity and find that in two systems (AB Aur and HD 72106) data suggest a new companion or asymmetric inner disk structure. We make predictions for the observability of our objects with the upcoming Multi-AperTure mid-Infrared SpectroScopic Experiment (MATISSE) instrument, supporting the practical preparations of future MATISSE observations of T Tauri stars.

Original languageEnglish
Article numberA83
JournalAstronomy and Astrophysics
Volume617
DOIs
Publication statusPublished - szept. 1 2018

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atlas
dust
silicate
interferometry
silicates
interferometer
visibility
T Tauri stars
statistical analysis
mineralogy
experiment
decomposition
apertures
young
stellar luminosity
stars
prediction
data products
protoplanetary disks
thermal emission

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

VLTI/MIDI atlas of disks around low- and intermediate-mass young stellar objects. / Varga, J.; Ábrahám, P.; Chen, L.; Ratzka, Th; Gabányi, K.; Kóspál; Matter, A.; Van Boekel, R.; Henning, Th; Jaffe, W.; Juhász, A.; Lopez, B.; Menu, J.; Moór, A.; Mosoni, L.; Sipos, N.

In: Astronomy and Astrophysics, Vol. 617, A83, 01.09.2018.

Research output: Article

Varga, J, Ábrahám, P, Chen, L, Ratzka, T, Gabányi, K, Kóspál, Matter, A, Van Boekel, R, Henning, T, Jaffe, W, Juhász, A, Lopez, B, Menu, J, Moór, A, Mosoni, L & Sipos, N 2018, 'VLTI/MIDI atlas of disks around low- and intermediate-mass young stellar objects', Astronomy and Astrophysics, vol. 617, A83. https://doi.org/10.1051/0004-6361/201832599
Varga, J. ; Ábrahám, P. ; Chen, L. ; Ratzka, Th ; Gabányi, K. ; Kóspál ; Matter, A. ; Van Boekel, R. ; Henning, Th ; Jaffe, W. ; Juhász, A. ; Lopez, B. ; Menu, J. ; Moór, A. ; Mosoni, L. ; Sipos, N. / VLTI/MIDI atlas of disks around low- and intermediate-mass young stellar objects. In: Astronomy and Astrophysics. 2018 ; Vol. 617.
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abstract = "Context. Protoplanetary disks show large diversity regarding their morphology and dust composition. With mid-infrared interferometry the thermal emission of disks can be spatially resolved, and the distribution and properties of the dust within can be studied. Aims. Our aim is to perform a statistical analysis on a large sample of 82 disks around low- and intermediate-mass young stars, based on mid-infrared interferometric observations. We intend to study the distribution of disk sizes, variability, and the silicate dust mineralogy. Methods. Archival mid-infrared interferometric data from the MIDI instrument on the Very Large Telescope Interferometer are homogeneously reduced and calibrated. Geometric disk models are used to fit the observations to get spatial information about the disks. An automatic spectral decomposition pipeline is applied to analyze the shape of the silicate feature. Results. We present the resulting data products in the form of an atlas, containing N band correlated and total spectra, visibilities, and differential phases. The majority of our data can be well fitted with a continuous disk model, except for a few objects, where a gapped model gives a better match. From the mid-infrared size-luminosity relation we find that disks around T Tauri stars are generally colder and more extended with respect to the stellar luminosity than disks around Herbig Ae stars. We find that in the innermost part of the disks (r 1 au) the silicate feature is generally weaker than in the outer parts, suggesting that in the inner parts the dust is substantially more processed. We analyze stellar multiplicity and find that in two systems (AB Aur and HD 72106) data suggest a new companion or asymmetric inner disk structure. We make predictions for the observability of our objects with the upcoming Multi-AperTure mid-Infrared SpectroScopic Experiment (MATISSE) instrument, supporting the practical preparations of future MATISSE observations of T Tauri stars.",
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AU - Varga, J.

AU - Ábrahám, P.

AU - Chen, L.

AU - Ratzka, Th

AU - Gabányi, K.

AU - Kóspál,

AU - Matter, A.

AU - Van Boekel, R.

AU - Henning, Th

AU - Jaffe, W.

AU - Juhász, A.

AU - Lopez, B.

AU - Menu, J.

AU - Moór, A.

AU - Mosoni, L.

AU - Sipos, N.

PY - 2018/9/1

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N2 - Context. Protoplanetary disks show large diversity regarding their morphology and dust composition. With mid-infrared interferometry the thermal emission of disks can be spatially resolved, and the distribution and properties of the dust within can be studied. Aims. Our aim is to perform a statistical analysis on a large sample of 82 disks around low- and intermediate-mass young stars, based on mid-infrared interferometric observations. We intend to study the distribution of disk sizes, variability, and the silicate dust mineralogy. Methods. Archival mid-infrared interferometric data from the MIDI instrument on the Very Large Telescope Interferometer are homogeneously reduced and calibrated. Geometric disk models are used to fit the observations to get spatial information about the disks. An automatic spectral decomposition pipeline is applied to analyze the shape of the silicate feature. Results. We present the resulting data products in the form of an atlas, containing N band correlated and total spectra, visibilities, and differential phases. The majority of our data can be well fitted with a continuous disk model, except for a few objects, where a gapped model gives a better match. From the mid-infrared size-luminosity relation we find that disks around T Tauri stars are generally colder and more extended with respect to the stellar luminosity than disks around Herbig Ae stars. We find that in the innermost part of the disks (r 1 au) the silicate feature is generally weaker than in the outer parts, suggesting that in the inner parts the dust is substantially more processed. We analyze stellar multiplicity and find that in two systems (AB Aur and HD 72106) data suggest a new companion or asymmetric inner disk structure. We make predictions for the observability of our objects with the upcoming Multi-AperTure mid-Infrared SpectroScopic Experiment (MATISSE) instrument, supporting the practical preparations of future MATISSE observations of T Tauri stars.

AB - Context. Protoplanetary disks show large diversity regarding their morphology and dust composition. With mid-infrared interferometry the thermal emission of disks can be spatially resolved, and the distribution and properties of the dust within can be studied. Aims. Our aim is to perform a statistical analysis on a large sample of 82 disks around low- and intermediate-mass young stars, based on mid-infrared interferometric observations. We intend to study the distribution of disk sizes, variability, and the silicate dust mineralogy. Methods. Archival mid-infrared interferometric data from the MIDI instrument on the Very Large Telescope Interferometer are homogeneously reduced and calibrated. Geometric disk models are used to fit the observations to get spatial information about the disks. An automatic spectral decomposition pipeline is applied to analyze the shape of the silicate feature. Results. We present the resulting data products in the form of an atlas, containing N band correlated and total spectra, visibilities, and differential phases. The majority of our data can be well fitted with a continuous disk model, except for a few objects, where a gapped model gives a better match. From the mid-infrared size-luminosity relation we find that disks around T Tauri stars are generally colder and more extended with respect to the stellar luminosity than disks around Herbig Ae stars. We find that in the innermost part of the disks (r 1 au) the silicate feature is generally weaker than in the outer parts, suggesting that in the inner parts the dust is substantially more processed. We analyze stellar multiplicity and find that in two systems (AB Aur and HD 72106) data suggest a new companion or asymmetric inner disk structure. We make predictions for the observability of our objects with the upcoming Multi-AperTure mid-Infrared SpectroScopic Experiment (MATISSE) instrument, supporting the practical preparations of future MATISSE observations of T Tauri stars.

KW - Circumstellar matter

KW - Infrared: stars

KW - Protoplanetary disks

KW - Stars: pre-main sequence

KW - Techniques: interferometric

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