1D radiative transfer models of 21 and 30 μm emission features in proto-planetary nebulae

Abstract

Spectral energy distributions of six proto-planetary nebulae showing 21 and 30μ features were fit with models obtained from 1D radiative transfer code, taking FeO and MgS respectively are the carriers of the features. Atomic abundances of these carrier materials were derived and they are lower or comparable to their stellar photospheric values. This strengthens the possibility of these materials to become the carriers of their respective features.