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Published February 21, 2003 | Published
Book Section - Chapter Open

Infrared interferometric observations of T Tauri stars

Abstract

We present observations of several T Tauri stars using long baseline infrared interferometry from the Palomar Testbed Interferometer. The target sources, T Tau N, SU Aur, RY Tau and DR Tau, are all known to be surrounded by dusty circumstellar disks. The observations directly trace the inner regions (<1 AU) of the disk and can be used to constrain the physical properties of this material. For three of the sources observed, the size scale of the infrared emission is tenths of AU, which is considerably larger than predicted by flat disk models. We discuss the implications of these results for models of circumstellar material, in particular the recent theoretical work suggesting the presence of an extended vertical wall at the inner edge of the disk.

Additional Information

© 2003 Society of Photo-optical Instrumentation Engineers (SPIE). This work was performed at the Interferometry Science Center and the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Data were obtained at the Palomar Observatory using the NASA Palomar Testbed Interferometer. Science operations with PTI are possible through the efforts of the PTI Collaboration (http://huey.jpl.nasa.gov/palomar/ptimembers.html). This work has made use of software produced by the Interferometry Science Center at the California Institute of Technology. We are grateful to T. Beck for providing the T Tau flux ratio.

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