A Sunspot Periodicity and Its Possible Relation to Solar Rotation.

Abstract

A least-squares power-spectrum analysis of 122 years of Zurich daily sunspot numbers yields a statistically significant peak at 12.0715 + or - .002 days period. This feature of the sunspot spectrum may be associated with the peak at 12.22 days (sideral) which Dicke (1976) found in his oblateness data, and may be attributable to the sun's core if it rotates at either 12.0715 days or 24.1430 days period (synodic). (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1978
Accession Number
ADA066613

Entities

People

  • J. W. Knight
  • K. H. Schatten
  • Peter A. Sturrock

Organizations

  • Stanford University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Aeronautics
  • Contracts
  • Data Science
  • Distortion
  • Frequency
  • Information Science
  • Intervals
  • Military Research
  • New York
  • Power Spectra
  • Probability
  • Rotation
  • Spectra
  • Statistical Analysis
  • Statistical Inference
  • Statistics

Readers

  • Solar Physics
  • Space Exploration and Orbital Mechanics.