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Fast Core Rotation in Red Giant Stars

Author: Paul Beck
Affiliation: IvS, KU Leuven, Belgium

Main category: Natural Sciences (Astronomy)

Caption:
This artist impression illustrates the rotation inside a red giant star. Such stars have radii of more than 5 times the radius of the Sun.


Further information:
This artist impression illustrates the rotation inside a red giant star. Such stars have radii of more than 5 times the radius of the Sun. Initially the outer layers, which are rotating very slowly, are shown. When these layers are hidden, the hot core of the star, which rotates 10 times faster than the surface, becomes visible. While the surface of this red giant needs about one year to complete a full revolution, it takes the core only a few weeks to rotate once. For better visual effect, the rotation rate is artificially increased. In the animation, 60 seconds correspond to an entire year in real time. Image Credits: Paul G. Beck, KU. Leuven


Further Reading: press release: http://fys.kuleuven.be/ster/Outreach/press-releases/spinningcore/corerotation scientific paper: http://adsabs.harvard.edu/abs/2012Natur.481...55B open access: http://arxiv.org/abs/1112.2825

Language: English

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