Infrared polarimetry of the reflection nebula near L 1551 IRS 5

Astronomy and Astrophysics – Astronomy

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Infrared Sources (Astronomy), Polarimetry, Reflection Nebulae, Interstellar Matter, Light Scattering, Stellar Winds

Scientific paper

The K-band polarization has been measured in the region extending 30 arcsec to the SW of L 1551 IRS 5. The degree of polarization is exceptionally high, reaching ≡67 per cent. The large polarizations and the azimuthal pattern of the position angles are attributed to scattering of infrared radiation from IRS 5 by dust grains. The infrared brightness distribution resembles that of the optical nebulosity. The authors propose that infrared scattering occurs at the 'walls' of a cavity formed by the interaction of stellar winds with the ambient cloud.

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