5:15 PM - 6:30 PM
[PPS15-P03] Modeling of Dust Emission from Disk Surrounding HD 142527
Keywords:HD 142527, Dust emission, Modeling
The peak surface densities of dust, Σ0, at PA = 21° (the brightest region) and PA = 221° (the faintest region) are 0.8 g cm-2 and 0.008 g cm-2, which are consistent with Muto et al. (2015). We cannot reproduce, however, the observed surface brightness in the northwestern region (PA = 291° − 351°), i.e., the near side with about 80% brightness of PA = 21°, even with Σ0 = 1.25 g cm-2. This is due to: (i) the heavy scattering; (ii) the dependence of the disk surface brightness on the veiwing angle. We solve the problem by reducing the scattering opacity to 10% of its original value. Subsequently, the Σ0 values for the brighter lopsided region (PA = 291° − 71°) become about 50% lower than their original values, while for the remaining optically thin regions Σ0 values do not change significantly. We will also discuss how such a scattering opacity can be realized.