Truncated Disks in TW Hya Association Multiple Star Systems

Details Truncated Disks in TW Hya Association Multiple Star Systems Truncated Disks in TW Hya Association Multiple Star Systems

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542805c&link_type=abstract

American Astronomical Society, AAS Meeting #215, #428.05; Bulletin of the American Astronomical Society, Vol. 42, p.345

Astronomy and Astrophysics

Astronomy

Scientific paper

We present high angular resolution (0.3" = 13 AU) SubMillimeter Array (SMA) observations of the 880 micron thermal continuum emission from circumstellar disks in the nearby HD 98800 and Hen 3-600 multiple-star systems. In both cases, the dust emission is localized around a single stellar component (HD 98800 B and Hen 3-600 A) with no evidence for circum-system material. We use two-dimensional Monte Carlo radiative transfer calculations to compare the SMA visibilities and broadband spectral energy distributions with truncated disk models, and use the results to estimate disk sizes. The inferred outer radii of 10-15 AU for HD 98800 B and 15-25 AU for Hen 3-600 A are in good agreement with theoretical predictions for disk truncation through tidal interactions with the stellar companions. This work is supported in part by the NSF REU and DOD ASSURE programs under NSF grant no. 0754568 and by the Smithsonian Institution.

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