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KH 15D is a system which consists of a young, eccentric binary, and acircumbinary disk which obscures the binary as the disk precesses. We develop aself-consistent model that provides a reasonable fit to the photometricvariability that was observed in the KH 15D system over the past 60 years. Ourmodel suggests that the circumbinary disk has an inner edge $r_{\rm in}\lesssim1 \ {\rm au}$, an outer edge $r_{\rm out} \sim {\rm a \ few \ au}$, and thatthe disk is misaligned relative to the stellar binary by $\sim$5-16 degrees,with the inner edge more inclined than the outer edge. The difference betweenthe inclinations (warp) and longitude of ascending nodes (twist) at the innerand outer edges of the disk are of order $\sim$10 degrees and $\sim$15 degrees,respectively. We also provide constraints on other properties of the disk, suchas the precession period and surface density profile. Our work demonstrates thepower of photometric data in constraining the physical properties ofplanet-forming circumbinary disks.

Constraining the Circumbinary Disk Tilt in the KH 15D system