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In his PhD dissertation Martin Bo Nielsen performs observational
studies of rotation in stars like the Sun. The interior rotation in
stars is thought to be one of the driving mechanisms of stellar
magnetic activity, but until now this mechanism was unconstrained
by observational data. NASA's Kepler space mission provides
high-precision observations of Sun-like stars which allow rotation
to be inferred using two independent methods: asteroseismology
measures the rotation of the stellar interior, while the brightness
variability caused by features on the stellar surface trace the
rotation of its outermost layers. By combining these two techniques
Martin Bo Nielsen was able to place upper limits on the variation
of rotation with depth in five Sun-like stars. These results
suggest that the interior of other Sun-like stars also rotate in
much the same way as our own Sun.
In his PhD dissertation Martin Bo Nielsen performs observational
studies of rotation in stars like the Sun. The interior rotation in
stars is thought to be one of the driving mechanisms of stellar
magnetic activity, but until now this mechanism was unconstrained
by observational data. NASA's Kepler space mission provides
high-precision observations of Sun-like stars which allow rotation
to be inferred using two independent methods: asteroseismology
measures the rotation of the stellar interior, while the brightness
variability caused by features on the stellar surface trace the
rotation of its outermost layers. By combining these two techniques
Martin Bo Nielsen was able to place upper limits on the variation
of rotation with depth in five Sun-like stars. These results
suggest that the interior of other Sun-like stars also rotate in
much the same way as our own Sun.
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