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Alexei A. Pevtsov
Researcher at University of Oulu
Publications - 268
Citations - 7649
Alexei A. Pevtsov is an academic researcher from University of Oulu. The author has contributed to research in topics: Sunspot & Magnetic field. The author has an hindex of 46, co-authored 248 publications receiving 7053 citations. Previous affiliations of Alexei A. Pevtsov include Russian Academy of Sciences & University of Hawaii.
Papers
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Latitudinal variation of helicity of photospheric magnetic fields
TL;DR: In this article, the average magnetic helicity of 69 diverse active regions, adopting the linear force-free field parameter alpha as a measure, was determined by minimizing the differences between the computed constant-alpha force free and observed horizontal magnetic fields.
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An Overview of Existing Algorithms for Resolving the 180° Ambiguity in Vector Magnetic Fields: Quantitative Tests with Synthetic Data
Thomas R. Metcalf,K. D. Leka,Graham Barnes,Bruce W. Lites,Manolis K. Georgoulis,Alexei A. Pevtsov,Krishnan Balasubramaniam,G. Allen Gary,Ju Jing,Jing Li,Yang Liu,Huaning Wang,Valentyna Abramenko,Vasyl Yurchyshyn,Yong-Jae Moon +14 more
TL;DR: In this article, the authors report on the state-of-the-art in algorithms used for resolving the 180° ambiguity in solar vector magnetic field measurements and compare them quantitatively and seek to understand where each succeeds, where it fails and why.
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The Relationship Between X-Ray Radiance and Magnetic Flux
Alexei A. Pevtsov,George H. Fisher,George H. Fisher,Loren W. Acton,Dana Longcope,Christopher M. Johns-Krull,Christopher M. Johns-Krull,Charles C. Kankelborg,Thomas R. Metcalf +8 more
TL;DR: In this paper, the authors used soft X-ray and magnetic field observations of the Sun and active stars to study the relationship between total unsigned magnetic flux and the power dissipated through coronal heating.
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Flux-Tube Twist Resulting from Helical Turbulence: The Σ-Effect
TL;DR: In this paper, the authors proposed that this twist is imparted to the magnetic flux through its interaction with turbulent velocities in the convection zone, which leads to twist of the same sense inferred from observation and opposite to that predicted by the α-effect.