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Deciphering solar magnetic activity. I. on the relationship between the sunspot cycle and the evolution of small magnetic features

  • Scott W. McIntosh
  • , Xin Wang
  • , Robert J. Leamon
  • , Alisdair R. Davey
  • , Rachel Howe
  • , Larisza D. Krista
  • , Anna V. Malanushenko
  • , Robert S. Markel
  • , Jonathan W. Cirtain
  • , Joseph B. Gurman
  • , William D. Pesnell
  • , Michael J. Thompson
  • National Center for Atmospheric Research
  • Peking University
  • Montana State University
  • Harvard-Smithsonian Center for Astrophysics
  • University of Birmingham
  • University of Colorado Boulder
  • Lockheed Martin
  • NASA Marshall Space Flight Center
  • NASA Goddard Space Flight Center

科研成果: 期刊稿件文章同行评审

摘要

Sunspots are a canonical marker of the Sun's internal magnetic field which flips polarity every ∼22 yr. The principal variation of sunspots, an ∼11 yr variation, modulates the amount of the magnetic field that pierces the solar surface and drives significant variations in our star's radiative, particulate, and eruptive output over that period. This paper presents observations from the Solar and Heliospheric Observatory and Solar Dynamics Observatory indicating that the 11 yr sunspot variation is intrinsically tied to the spatio-temporal overlap of the activity bands belonging to the 22 yr magnetic activity cycle. Using a systematic analysis of ubiquitous coronal brightpoints and the magnetic scale on which they appear to form, we show that the landmarks of sunspot cycle 23 can be explained by considering the evolution and interaction of the overlapping activity bands of the longer-scale variability.

源语言英语
文章编号12
期刊Astrophysical Journal
792
1
DOI
出版状态已出版 - 1 9月 2014
已对外发布

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