Differential Rotation in Sun-like Stars from Surface Variability and Asteroseismology

Nonfiction, Science & Nature, Science, Physics, Astronomy, Astrophysics & Space Science
Cover of the book Differential Rotation in Sun-like Stars from Surface Variability and Asteroseismology by Martin Bo Nielsen, Springer International Publishing
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Author: Martin Bo Nielsen ISBN: 9783319509891
Publisher: Springer International Publishing Publication: January 24, 2017
Imprint: Springer Language: English
Author: Martin Bo Nielsen
ISBN: 9783319509891
Publisher: Springer International Publishing
Publication: January 24, 2017
Imprint: Springer
Language: English

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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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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