ENGLISH

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

By Martin Bo Nielsen (auth.)

Book information

Publisher
Springer International Publishing
Year
2017
ISBN
978-3-319-50988-4, 978-3-319-50989-1
DOI
10.1007/978-3-319-50989-1
Language
english
Format
PDF
Filesize
4 MB (3924802 bytes)
Series
Springer Theses
Edition
1
Pages
XVI, 101\110
Time added
2017-04-19 23:42:45
Astrophysics and Astroparticles;AstronomyObservations and Techniques

Description

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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