Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000esasp.456..329h&link_type=abstract
ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy. Eds. A. Salama, M.F.Kessler, K. Leech & B. Schulz. ESA-SP
Astronomy and Astrophysics
Astrophysics
1
Iso, Solid-State Astrophysics, Cosmic Dust, Infrared Spectroscopy, Laboratory Data
Scientific paper
Observations with the Infrared Space Observatory led to a breakthrough in our understanding of the chemical composition and the lifecycle of cosmic grains. Now, a complete inventory of cosmic ices is possible and the nature of the carriers of the Unidentified Infra Red (UIR) bands can be better understood. A lot of new information has been collected for oxidic grains, including the detection of crystalline silicates in a large variety of environments. The paper will review what has been learned from ISO observations for oxygen-based dust grains. The ISO spectra contain quite a lot of features the carriers of which are still not identified. Among these features are the strong 21 and 30 micron bands which have been found in carbon-rich evolved stars. The paper will discuss the new constraints coming from ISO for the nature of the carriers of these features.
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