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The quadruple young stellar system HD 98800 consists of two spectroscopicbinary pairs with a circumbinary disk around the B component. Recent work byBoden and collaborators using infrared interferometry and radial velocity dataresulted in a determination of the physical orbit for HD 98800 B. We use theresulting inclination of the binary and the measured extinction toward the Bcomponent stars to constrain the distribution of circumbinary material.Although a standard optically and geometrically thick disk model can reproducethe spectral energy distribution, it can not account for the observedextinction if the binary and the disk are co-planar. We next constructed adynamical model to investigate the influence of the A component, which is notin the Ba-Bb orbital plane, on the B disk. We find that these interactions havea substantial impact on the inclination of the B circumbinary disk with respectto the Ba-Bb orbital plane. The resulting warp would be sufficient to placematerial into the line of sight and the non-coplanar disk orientation may alsocause the upper layers of the disk to intersect the line of sight if the diskis geometrically thick. These simulations also support that the dynamics of theBa-Bb orbit clear the inner region to a radius of ~3 AU. We then discusswhether the somewhat unusual properties of the HD 98800 B disk are consistentwith material remnant from the star formation process or with more recentcreation by collisions from larger bodies.

The circumbinary disk of HD 98800 B: Evidence for disk warping