Differential rotation in sun-like stars from surface variability and asteroseismology doctoral thesis accepted by the University of Gottingen, Gottingen, Germany /

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...

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Main Author: Nielsen, Martin Bo,
Other Authors: SpringerLink (Online service)
Format: eBook
Language: English
Published: New York, NY : Springer Berlin Heidelberg, [2017]
Physical Description: 1 online resource (110 pages) : color illustrations.
Series: Springer theses.
Subjects:
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245 1 0 |a Differential rotation in sun-like stars from surface variability and asteroseismology :  |b doctoral thesis accepted by the University of Gottingen, Gottingen, Germany /  |c Martin Bo Nielsen. 
264 1 |a New York, NY :  |b Springer Berlin Heidelberg,  |c [2017] 
264 4 |c ©2017. 
300 |a 1 online resource (110 pages) :  |b color illustrations. 
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490 1 |a Springer theses. 
504 |a Includes bibliographical references and index. 
505 0 |a Supervisor's Foreword; Preface; Publications; Acknowledgements; Thesis Advisory Committee Members:; Contents; 1 Introduction; 1.1 Evolution of Stellar Rotation Rates; 1.1.1 Rotation on the Pre-main-Sequence; 1.1.2 Main-Sequence Rotation; 1.1.3 Differential Rotation in Other Stars; 1.2 Measuring Stellar Rotation with Kepler; 1.2.1 Kepler Photometry; 1.2.2 Photometric Time Series Analysis; 1.2.3 Measuring Rotation from Surface Variability; 1.2.4 Measuring Rotation from Asteroseismology; 1.3 Applications of Rotation Measurements; 1.3.1 Gyrochronology. 
505 8 |a 1.3.2 Impact of Rotation on Stellar Evolution1.3.3 Solar and Stellar Dynamos; References; 2 Paper I -- Rotation Periods of 12,000 Main-Sequence Kepler Stars; 2.1 Summary of Paper I; 2.2 Introduction; 2.3 Measuring Stellar Rotation; 2.3.1 Kepler photometry; 2.3.2 Detecting Rotation Periods; 2.3.3 Selecting Stable Rotation Periods; 2.4 Consistency with measurements; 2.5 Rotation of Late Type Stars; 2.6 Conclusions; 2.7 Further Discussion of Chap. 1; References; 3 Paper II -- Rotational Splitting as a Function of Mode Frequency for Six Sun-like Stars; 3.1 Summary of Paper II; 3.2 Introduction. 
505 8 |a 3.3 Analysis3.3.1 Observations; 3.3.2 Power Spectrum Model; 3.3.3 Fitting; 3.4 Rotation and Inclination as a Function of Frequency; 3.5 Further Discussion of Chap. 2; References; 4 Paper III -- Constraining Differential Rotation of Sun-like Stars from Asteroseismic and Starspot Rotation Periods; 4.1 Summary of Paper III; 4.2 Introduction; 4.3 Measuring Rotation Periods; 4.3.1 Asteroseismic Rotation Periods; 4.3.2 Surface Variability Periods; 4.4 Comparing Asteroseismic and Surface Variability Periods; 4.5 Gyrochronology; 4.6 Conclusions; 4.7 Further Discussion of Chap. 3; References. 
505 8 |a 5 Discussion: Constraining Interior Rotational Shear5.1 Modeling Radial Differential Rotation; 5.1.1 Computing the Mode Set Splittings; 5.1.2 Using Only Seismic Data to Constrain the Radial Shear; 5.1.3 Using Prior Information from Surface Variability; 5.2 Conclusion; References; Appendix A Clusters Used in Fig. 1.1; Appendix B Detrending and Corrections in PDC/msMAP Data; Appendix C Measuring Rotation with Spectroscopy; Index. 
520 |a 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. 
650 0 |a Stars  |x Rotation. 
650 0 |a Astroseismology. 
650 6 |a Étoiles  |x Rotation. 
650 6 |a Astérosismologie. 
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650 7 |a SCIENCE  |x Astronomy.  |2 bisacsh. 
650 7 |a Astroseismology.  |2 fast. 
650 7 |a Stars  |x Rotation.  |2 fast. 
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