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Optical Properties of Amorphous Alumina Dust in the Envelopes around O-Rich AGB Stars

Suh, Kyung-Won

We investigate optical properties of amorphous alumina (Al_2O_3) dust grains in the envelopes around O-rich asymptotic giant branch (AGB) stars considering the laboratory measured optical data. We derive the optical constants of amorphous alumina in a wide wavelength range that satisfy the Kramers-Kronig relation and reproduce the laboratory measu…