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We observe a significant change in the TW Hya disk interior to 40~AU viaarchival unpolarized multi-wavelength Hubble Space Telescope/STIS and NICMOSimages with an inner working angle (IWA) of 0\farcs4 (22~AU). Our images showthe outer edge of a clearing at every wavelength with similar behavior,demonstrating that the feature is structural, rather than due to some propertyof polarized light in the disk. We compare our observations to those taken byAkiyama et al. (2015) and Rapson et al. (2015), and discuss the spectralevolution of the disk interior to 80~AU. We construct a model with two gaps:one at 30~AU and one at 80~AU that fit the observed surface brightness profilebut overpredicts the absolute brightness of the disk. Our models require anadditional dimming to be consistent with observations, which we tentativelyascribe to shadowing. The gap structures seen in scattered light are spatiallycoincident with sub-mm detections of CO and N$_2$H$^+$, and are near expectedcondensation fronts of these molecular species, providing tentative evidencethat the structures seen in scattered light may be correlated with chemicalchanges in the disk.

The inner structure of the TW Hya Disk as revealed in scattered light