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Fig. 5


Infrared spectrum of R Dor (black, full line), W Hya (gray, full line, scaled with a factor 1.5), and IK Tau (red, dashed line). Spectral features arising from dust species such as crystalline and amorphous Al2O3, gehlenite (Ca2Al2SiO7), and so-called astronomical silicates (amorphous olivines with different relative magnesium and iron fractions; de Vries et al. 2010) are indicated.

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