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: Contribution to journalConference article


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
Issue number4
Publication statusPublished - Jan 1 2017
Event2017 Conference Francesco's Legacy: Star Formation in Space and Time - Firenze, Italy
Duration: Jun 5 2017Jun 9 2017

ASJC Scopus subject areas

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

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