Radiative transfer modeling of the observed SED and continuum image of HR3126. (a) Comparison of the SED between the best-fit model and the observed data. The solid black line and the dotted line represent the total flux and stellar flux predicted by the best-fit model, respectively. Filled circles show the photometric data compiled in Chiar et al. (1993), which we dereddened with A_V = 1.18 and R_V = 3.1 (Sect. 2). The original data from Chiar et al. (1993) without dereddening are plotted with the open circles (data points longward of 3 μm are not shown because the reddening is negligible). The data taken with COBE/DIRBE, AKARI, and Hershel/PACS are plotted with the open squares, open triangles, and filled square, respectively. The solid green line represents the ISO/SWS spectrum. The blue crosses show the VISIR measurements of the present work (Sect. 4.2). The inset shows an enlarged view of the mid-infrared wavelength region. (b) 2.2 μm image predicted by the best-fit model. (c) Image reconstructed from the simulated interferometric data generated from the best-fit model image. (d) Image reconstructed at 2.25 μm in the continuum shown in Fig. 4c. The images in panels b, c, and d are not convolved with a beam.