Do twin spectral peaks of olivine particles in the thermal infrared diagnose their sizes and porosities?

A well-established constraint on the size of non-porous olivine grains or porosity aggregates consisting small from prominent narrow peaks in thermal infrared spectra characteristic crystalline silicates is reexamined. To thoroughly investigate peaks, we make theoretical argument for absorption and scattering light by non-porous, non-spherical particles, which followed numerical verification. Our study provides perfectly rational explanations physics behind small-particle effect emission framework classical electrodynamics convincing evidence small-particle’s literature. While resonant excited surface roughness order submicrometer scales can be identified even particles with a radius 10μm, it makes only negligible contribution to particles. In contrast, has significant impact strength wavelength while an ensemble takes place at different than one expects roughness. We finally reaffirm that twin dust astronomical environments are intrinsic diagnostic characters submicrometer-sized their aggregate fluffy porous configurations.