Mid-IR spectra of HD 142527 inner disc and common dust types

Mid-IR spectrum of the inner region of the protoplanetary disc around the young star HD 142527, as observed with the MIDI instrument at the VLT Interferometer (upper). Below it are shown laboratory spectra of two crystalline minerals as well as of an Interplanetary Dust Particle (IDP; captured in the Earth's upper atmosphere) with hydrated silicates and, at the bottom, a typical telescopic spectrum of dust grains in the interstellar space. The spectral "signatures" of crystalline pyroxene and olivine, i.e. peaks at wavelength 9.2 and 11.3 µm, respectively, are clearly visible in the spectrum of the inner stellar disc, demonstrating the presence of these species in that region of the disc.

Crédit:

ESO

À propos de l'image

Identification:eso0435a
Type:Graphique
Date de publication:24 novembre 2004
Communiqués de presse en rapport:eso0435
Taille:800 x 942 px

À propos de l'objet

Nom:HD 142527
Type:Milky Way : Star : Circumstellar Material : Disk : Protoplanetary
Distance:450 années lumière
Catégorie:Stars

Formats des images

Grand JPEG
128,6 Kio
JPEG taille écran
147,8 Kio

Couleurs & filtres

DomaineTélescope
Infrarouge
Near-IR
Very Large Telescope Interferometer
MIDI