Probing the temporal and spatial variations of dust emission in the protoplanetary disk of DG Tau with VLTI/MIDI: Preliminary results

K. E. Gabányi, L. Mosoni, A. Juhász, P. Ábrahám, T. Ratzka, N. Sipos, R. van Boekel, W. Jaffe

Research output: Article

1 Citation (Scopus)

Abstract

The signatures of dust processing and grain growth - related to the formation of rocky planets - are easily seen in midinfrared spectral features. One important diagnostic tool in this context is the silicate feature in the spectra of young stellar objects (YSO). The low-mass YSO, DG Tau shows unique temporal variations in its silicate feature. We conducted multi-epoch observations of DG Tau with the MID-Infrared Interferometric instrument of the Very Large Telescope Interferometer to obtain the spectra of the inner and outer disk regions in order to investigate where the previously reported variations of the silicate feature originate from. Here we present the preliminary results of the first two epochs of observations. We found that on a time-scale of two months, the source showed significant brightening. At the same time the mid-infrared emitting region expanded. While the identification of the silicate feature is difficult, our results qualitatively agree with the scenario explaining the varying silicate feature with dust lifted up above the disk.

Original languageEnglish
Pages (from-to)912-915
Number of pages4
JournalAstronomische Nachrichten
Volume334
Issue number9
DOIs
Publication statusPublished - nov. 2013

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protoplanetary disks
silicates
temporal variation
spatial variation
silicate
dust
time measurement
infrared instruments
interferometer
planets
planet
interferometers
signatures
telescopes
timescale

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Probing the temporal and spatial variations of dust emission in the protoplanetary disk of DG Tau with VLTI/MIDI : Preliminary results. / Gabányi, K. E.; Mosoni, L.; Juhász, A.; Ábrahám, P.; Ratzka, T.; Sipos, N.; van Boekel, R.; Jaffe, W.

In: Astronomische Nachrichten, Vol. 334, No. 9, 11.2013, p. 912-915.

Research output: Article

Gabányi, K. E. ; Mosoni, L. ; Juhász, A. ; Ábrahám, P. ; Ratzka, T. ; Sipos, N. ; van Boekel, R. ; Jaffe, W. / Probing the temporal and spatial variations of dust emission in the protoplanetary disk of DG Tau with VLTI/MIDI : Preliminary results. In: Astronomische Nachrichten. 2013 ; Vol. 334, No. 9. pp. 912-915.
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T2 - Preliminary results

AU - Gabányi, K. E.

AU - Mosoni, L.

AU - Juhász, A.

AU - Ábrahám, P.

AU - Ratzka, T.

AU - Sipos, N.

AU - van Boekel, R.

AU - Jaffe, W.

PY - 2013/11

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N2 - The signatures of dust processing and grain growth - related to the formation of rocky planets - are easily seen in midinfrared spectral features. One important diagnostic tool in this context is the silicate feature in the spectra of young stellar objects (YSO). The low-mass YSO, DG Tau shows unique temporal variations in its silicate feature. We conducted multi-epoch observations of DG Tau with the MID-Infrared Interferometric instrument of the Very Large Telescope Interferometer to obtain the spectra of the inner and outer disk regions in order to investigate where the previously reported variations of the silicate feature originate from. Here we present the preliminary results of the first two epochs of observations. We found that on a time-scale of two months, the source showed significant brightening. At the same time the mid-infrared emitting region expanded. While the identification of the silicate feature is difficult, our results qualitatively agree with the scenario explaining the varying silicate feature with dust lifted up above the disk.

AB - The signatures of dust processing and grain growth - related to the formation of rocky planets - are easily seen in midinfrared spectral features. One important diagnostic tool in this context is the silicate feature in the spectra of young stellar objects (YSO). The low-mass YSO, DG Tau shows unique temporal variations in its silicate feature. We conducted multi-epoch observations of DG Tau with the MID-Infrared Interferometric instrument of the Very Large Telescope Interferometer to obtain the spectra of the inner and outer disk regions in order to investigate where the previously reported variations of the silicate feature originate from. Here we present the preliminary results of the first two epochs of observations. We found that on a time-scale of two months, the source showed significant brightening. At the same time the mid-infrared emitting region expanded. While the identification of the silicate feature is difficult, our results qualitatively agree with the scenario explaining the varying silicate feature with dust lifted up above the disk.

KW - Infrared: stars

KW - Protoplanetary disks

KW - Stars: individual (DGTau)

KW - Stars: pre-main sequence

KW - Techniques: interferometric

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