Near-infrared extinction law in the Rho Ophiuchi, Chamaeleon, and Coalsack dark clouds

Astronomy and Astrophysics – Astronomy

Scientific paper

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Dark Clouds, Extinction

Scientific paper

Near-infrared observation has been used for studies of dense clouds, as it is more robust against dust extinction than ultraviolet to optical ones. Dust extinction provides us with information on characteristic of dust in dense clouds. While ultraviolet to optical extinction law has been well studied so far, near-infrared extinction law still remains an important issue to be solved. We carried out near-infrared observations of nearby dark clouds in the Rho Ophiuchi, Chamaeleon, and Coalsack. We obtained an accurate extinction law for each cloud and propose that the near-infrared extinction can be a probe for grain growth of dust in dark clouds.

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