L. ChenA. KreplinG. WeigeltK. -H. HofmannD. SchertlF. MalbetMASSI, FabrizioFabrizioMASSIR. PetrovPh. Stee2020-06-192020-06-1920160004-6361http://hdl.handle.net/20.500.12386/26154Studies of pre-transitional disks, with a gap region between the inner infrared-emitting region and the outer disk, are important to improving our understanding of disk evolution and planet formation. Previous infrared interferometric observations have shown hints of a gap region in the protoplanetary disk around the Herbig Ae star HD 144432. We study the dust distribution around this star with two-dimensional radiative transfer modeling. We compare the model predictions obtained via the Monte-Carlo radiative transfer code RADMC-3D with infrared interferometric observations and the SED of HD 144432. The best-fit model that we found consists of an inner optically thin component at 0.21-0.32 AU and an optically thick outer disk at 1.4-10 AU. We also found an alternative model in which the inner sub-AU region consists of an optically thin and an optically thick component. Our modeling suggests an optically thin component exists in the inner sub-AU region, although an optically thick component may coexist in the same region. Our modeling also suggests a gap-like discontinuity in the disk of HD 144432.STAMPAenArticle10.1051/0004-6361/2014240202-s2.0-84957031005000369715900065https://www.aanda.org/articles/aa/abs/2016/02/aa24020-14/aa24020-14.html2016A&A...586A..54CFIS/05 - ASTRONOMIA E ASTROFISICA