Inner Structure in the TW Hya Circumstellar Disk

Details Inner Structure in the TW Hya Circumstellar Disk Inner Structure in the TW Hya Circumstellar Disk

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822605a&link_type=abstract

American Astronomical Society, AAS Meeting #218, #226.05; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

TW Hya is a nearby (50 pc) young stellar object with an estimated age of 10 Myr and signs of active accretion. Previous modeling of the circumstellar disk has shown that the inner disk contains optically thin material, placing this object in the class of "transition disks". We present new near-infrared interferometric observations of the disk material and use these data, as well as previously published, spatially resolved data at 10 microns and 7 mm, to constrain disk models based on a standard flared disk structure. Our model demonstrates that the constraints imposed by the spatially resolved data can be met with a physically plausible disk but this requires a disk containing not only an inner gap in the optically thick disk as previously suggested, but also some optically thick material within this gap. Our model is consistent with the suggestion by previous authors of a planet with an orbital radius of a few AU.
This work was conducted at the NASA Exoplanet Science Institute, California Institute of Technology.

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