Mid-IR spectra of Inner and Outer Discs around Three Young Stars

Schematic view of a circumstellar disc and the MIDI-spectra observed of the inner and outer regions of the discs around three young stars, HD 163296, HD 144432 and HD 142527 (black lines). In all of them, there are clear spectral differences between the inner and outer regions, indicating a difference in mineralogy. The general broadening of the spectral "mountain" in the inner discs is a sign of larger grains and the spectral peak at wavelength 11.3 µm indicates the presence of crystalline silicates. Also shown are best-fit model spectra (red lines), based on mixtures of the mentioned mineral species.

Credit:

ESO

About the Image

Id:eso0435b
Type:Collage
Release date:24 November 2004
Related releases:eso0435
Size:800 x 999 px

About the Object

Name:HD 142527, HD 144432, HD 163296
Type:• Milky Way : Star : Evolutionary Stage : Young Stellar Object
• X - Stars

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Colours & filters

BandTelescope
Infrared
Mid-IR
Very Large Telescope Interferometer
MIDI

 

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