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We present comprehensive models for the Herbig Ae stars MWC275 and AB Aurthat aim to explain their spectral energy distribution (from UV to millimeter)and long baseline interferometry (from near-infrared to millimeter)simultaneously. Data from the literature, combined with new mid-infrared (MIR)interferometry from the Keck Segment Tilting Experiment, are modeled using anaxisymmetric Monte Carlo radiative transfer code. Models in which most of thenear-infrared (NIR) emission arises from a dust rim fail to fit the NIRspectral energy distribution (SED) and sub-milli-arcsecond NIR CHARAinterferometry. Following recent work, we include an additional gas emissioncomponent with similar size scale to the dust rim, inside the sublimationradius, to fit the NIR SED and long-baseline NIR interferometry on MWC275 andAB Aur. In the absence of shielding of star light by gas, we show that thegas-dust transition region in these YSOs will have to contain highly refractorydust, sublimating at ~1850K. Despite having nearly identical structure in thethermal NIR, the outer disks of MWC275 and AB Aur differ substantially. Incontrast to the AB Aur disk, MWC275 lacks small grains in the disk atmospherecapable of producing significant 10-20micron emission beyond ~7AU, forcing theouter regions into the "shadow" of the inner disk

A Tale of Two Herbig Ae stars -MWC275 and AB Aurigae: Comprehensive Models for SED and Interferometry