Interstellar dust: current status and perspectives

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astrophysics, Interstellar Dust, Review, Interstellar Extinction, Interstellar Emission, Interstellarpolarization, Interstellar Elemental Depletion

Scientific paper

Interstellar grains reveal their presence in the space between stars through their interaction with the electromagnetic radition: they absorb, scatter, redden and polarize starlight, luminesce in the far-red, and emit the absorbed energy at longer wavelengths (i.e. infrared and submillimeter). In this review we present an overview of our current knowledge about the absorption, scattering, polarization, luminescence and infrared emission properties of interstellar dust. Indirect evidence for the presence of interstellar dust including the interstellar elemental depletion and presolar grains in interplanetary dust particles and in meteorites is also discussed. A comparative review of the current popular grain models (i.e. the silicate-graphite-PAHs model, the silicate core-carbonaceous organic refractory mantle model, and the composite model) is also presented.

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