SEDs of ρ Oph A. For models II.1 (black) and II.3 (blue), the emerging specific intensity has been integrated over the core ρ Oph A that is displayed in Fig. 13d. The thermal equilibrium model II.1 uses the extinction curve as modified by Ossenkopf & Henning (1994). The non-equilibrium model II.3 uses that of Weingartner & Draine (2001) for R_V = 5.5, which includes the PAHs, and where by comparison, the 100 and 160 μm fluxes are reduced.