Mineralogy of Circumstellar and Interstellar Dust: The SPICA Potential

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Galaxies: Interstellar Matter, Stars: Formation, Stars: Evolved Stars, Missions: Spica

Scientific paper

The mid-infared spectral region contains many resonances of dust species that are of astrophysical interest. These resonances can be used to trace the dust cycle in galaxies, starting from the evolved low- and high mass stars, through the interstellar medium to molecular clouds and proto-planetary systems. In particular the mineralogy of circumstellar dust is very rich, reflecting the wide range in physical and chemical conditions that occur near stars in different evolutionary phases. Astromineralogy also offers a quantitative link between the composition of ob jects in the solar system, and proto-planetary disks and debris disks that are observed around young and mature stars.

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