Interferometric evidence for resolved warm dust in the DQ Tau system

Creators: Boden, Andrew F.; Akeson, Rachel L.; Sargent, Anneila I.; Carpenter, John M.; Ciardi, David R.; Bary, Jeffrey S.; Skrutskie, Michael F.

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.

Additional Information

© 2009 American Astronomical Society. Print publication: Issue 2 (2009 May 10); received 2009 February 16; accepted for publication 2009 March 13; published 2009 April 17. Data presented herein were obtained at the W. M. Keck Observatory. We gratefully acknowledge the support of personnel at the Jet Propulsion Laboratory, W. M. Keck Observatory, and the NASA Exoplanet Science Institute in KI observations of DQ Tau. We thank the anonymous referee for his comments on including the veiling luminosity in the SED modeling for DQ Tau.

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