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.

Oikeudet:

ESO

Kuvasta

Tunnistus:eso0435a
Tyyppi:Taulukko
Julkaisupäivä:24. marraskuuta 2004
Vastaavat julkaisut:eso0435
Koko:800 x 942 px

Kohteesta

Nimi:HD 142527
Tyyppi:Milky Way : Star : Circumstellar Material : Disk : Protoplanetary
Etäisyys:450 valovuotta
Kategoria:Stars

Kuvaformaatit

Suuri JPEG
128,6 KB
Kokoruudun JPEG
147,8 KB

Värit ja suotimet

KaistaTeleskooppi
Infrapuna
Near-IR
Very Large Telescope Interferometer
MIDI