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Title:
Interferometric Evidence for Resolved Warm Dust in the DQ Tau System
Authors:
Boden, Andrew F.; Akeson, Rachel L.; Sargent, Anneila I.; Carpenter, John M.; Ciardi, David R.; Bary, Jeffrey S.; Skrutskie, Michael F.
Affiliation:
AA(Division of Physics, Math, and Astronomy, California Institute of Technology, MS 105-24, Pasadena, CA 91125, USA ; NASA Exoplanet Science Institute, California Institute of Technology, 770 South Wilson Ave., Pasadena CA 91125, USA ; ), AB(NASA Exoplanet Science Institute, California Institute of Technology, 770 South Wilson Ave., Pasadena CA 91125, USA ), AC(Division of Physics, Math, and Astronomy, California Institute of Technology, MS 105-24, Pasadena, CA 91125, USA ), AD(Division of Physics, Math, and Astronomy, California Institute of Technology, MS 105-24, Pasadena, CA 91125, USA ), AE(NASA Exoplanet Science Institute, California Institute of Technology, 770 South Wilson Ave., Pasadena CA 91125, USA ), AF(Department of Physics & Astronomy, Colgate University Hamilton NY 13346, USA ; Department of Astronomy, University of Virginia, Charlottesville, VA 22902, USA), AG(Department of Astronomy, University of Virginia, Charlottesville, VA 22902, USA)
Publication:
The Astrophysical Journal Letters, Volume 696, Issue 2, pp. L111-L114 (2009). (ApJL Homepage)
Publication Date:
05/2009
Origin:
IOP
ApJ Keywords:
binaries: spectroscopic, circumstellar matter, stars: individual: DQ Tau, stars: pre-main sequence
DOI:
10.1088/0004-637X/696/2/L111
Bibliographic Code:
2009ApJ...696L.111B

Abstract

We report on near-infrared (IR) interferometric observations of the double-lined pre-main sequence binary system DQ Tau. We model these data with a visual orbit for DQ Tau supported by the spectroscopic orbit and analysis of Mathieu et al. Further, DQ Tau exhibits significant near-IR excess; modeling our data requires inclusion of near-IR light from an "excess" source. Remarkably, the excess source is resolved in our data, similar in scale to the binary itself (~0.2 AU at apastron), rather than the larger circumbinary disk (~0.4 AU radius). Our observations support the Mathieu et al. and Carr et al. inference of significant warm material near the DQ Tau binary.
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