Mid-infrared interferometric variability of DG tau: Implications for the inner-disk structure

P. Ábrahám, J. Varga, K. Gabányi, L. Chen, Kóspál, Th Ratzka, R. Van Boekel, L. Mosoni, Th Henning

Research output: Conference article

Abstract

DG Tau is a low-mass young star whose strongly accreting disk shows a variable 10 μm silicate feature, that may even turn temporarily from emission to absorption. Aiming to find the physical reason of this variability, we analysed multiepoch VLTI/MIDI interferometric observations. We found that the inner disk within 3 au radius exhibits a 10 μm absorption feature related to amorphous silicate grains, while the outer disk displays a variable crystalline feature in emission, similar in shape to the spectrum of comet Hale-Bopp. The variability may be related to a fluctuating amount of dusty material above the disk surface, possibly due to turbulence.

Original languageEnglish
Pages (from-to)759-760
Number of pages2
JournalMemorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society
Volume88
Issue number4
Publication statusPublished - jan. 1 2017
Event2017 Conference Francesco's Legacy: Star Formation in Space and Time - Firenze, Italy
Duration: jún. 5 2017jún. 9 2017

Fingerprint

Silicates
Infrared radiation
Stars
silicates
Turbulence
Hale-Bopp comet
Crystalline materials
turbulence
stars
radii

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiology Nuclear Medicine and imaging
  • Astronomy and Astrophysics
  • Instrumentation
  • Atomic and Molecular Physics, and Optics

Cite this

Mid-infrared interferometric variability of DG tau : Implications for the inner-disk structure. / Ábrahám, P.; Varga, J.; Gabányi, K.; Chen, L.; Kóspál; Ratzka, Th; Van Boekel, R.; Mosoni, L.; Henning, Th.

In: Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society, Vol. 88, No. 4, 01.01.2017, p. 759-760.

Research output: Conference article

Ábrahám, P, Varga, J, Gabányi, K, Chen, L, Kóspál, Ratzka, T, Van Boekel, R, Mosoni, L & Henning, T 2017, 'Mid-infrared interferometric variability of DG tau: Implications for the inner-disk structure', Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society, vol. 88, no. 4, pp. 759-760.
Ábrahám, P. ; Varga, J. ; Gabányi, K. ; Chen, L. ; Kóspál ; Ratzka, Th ; Van Boekel, R. ; Mosoni, L. ; Henning, Th. / Mid-infrared interferometric variability of DG tau : Implications for the inner-disk structure. In: Memorie della Societa Astronomica Italiana - Journal of the Italian Astronomical Society. 2017 ; Vol. 88, No. 4. pp. 759-760.
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