The problematically short superwind of OH/IR stars - Probing the outflow with the 69 μm spectral band of forsterite

B. L. de Vries, J. A. D. L. Blommaert, L. B. F. M. Waters +4

Spectra of OH/IR stars show prominent spectral bands of crystalline olivine (Mg${}_{(2-2x)}$Fe${}_{(2x)}$SiO${}_4$). To learn more about the timescale of the outflows of OH/IR stars, w…