Stellar Tomography |
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Authors: | A Collier Cameron |
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Institution: | (1) University of St Andrews School of Physics and Astronomy, North Haugh, St Andrews, Fife, Scotland, KY16 9SS |
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Abstract: | I review recent progress in the field of stellar surface imaging, with particular reference to advanced methods for mapping
surface-brightness inhomogeneities and the surface vector magnetic field on magnetically active late-type stars. New signal
enhancement techniques, utilising profile information from hundreds or thousands of photospheric lines simultaneously, allow
images to be derived for stars several magnitudes fainter than was previously possible. For brighter stars, the same techniques
make it possible to map features as small as two or three degrees in extent on the stellar surface. This opens up whole new
areas of research, such as the ability to use starspot tracking to study surface differential rotation patterns on single
and binary stars, and to follow the secular evolution of the magnetic field itself.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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