Barry Rice

- doing science on a terrestrial planet -

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Infrared photopolarimetric maps

Sharpless 106: H band intensity map
The image scale is 0.6 arcseconds per pixel, north is at the top. The right half of the image reproduces the data but with a different image stretch so polarization vectors can be superimposed. The beautiful centrosymmetric vector pattern is centered in the source IRS 4. Polarizations reach values as high as 40% at the edges of the outflow.

Sharpless 140: H band intensity map
The image scale is 0.6 arcseconds per pixel. The polarizations reach as high as 30%, and in contrast with Sharpless 106, the vectors are chaotically arranged, suggesting that more than one source is responsible for the scattered light in this nebula.

NGC 2264 region: J band intensity map
The large dark dots are holes where I have removed saturated stellar images. The right portion redisplays the data with superimposed polarization vectors. The source responsible for illuminating the complex region of nebulosity is revealed as the star at the core of the centrosymmetric pattern. This star is a deeply embedded source involved with a bipolar outflow.

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10 November 2007