Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (35) (Citation History)
· Refereed Citations to the Article
· Reads History
·
· Translate This Page
Title:
Search for evidence of a clock related to the solar 154 day complex of periodicities
Authors:
Sturrock, P. A.; Bai, T.
Affiliation:
AA(Stanford Univ., CA), AB(Stanford Univ., CA)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 397, no. 1, p. 337-346. (ApJ Homepage)
Publication Date:
09/1992
Category:
Solar Physics
Origin:
STI
NASA/STI Keywords:
Solar Activity, Solar Rotation, Spectrum Analysis, Spherical Harmonics, Sunspots, Nyquist Frequencies, Orbital Mechanics, Oscillators, Power Spectra, Solar Maximum Mission
DOI:
10.1086/171789
Bibliographic Code:
1992ApJ...397..337S

Abstract

Evidence indicates that the 154-day periodicity in solar activity may be part of a complex of periodicities that are approximate multiples of 25.8 d, which suggests that the sun contains a 'clock' with frequency in the range 440-463 nHz. To search for evidence of this clock, the daily Greenwich sunspot areas and daily Zurich sunspot numbers have been Fourier-analyzed. The Zurich data show a strong peak that may clearly be identified with the fundamental frequency, while the Greenwich data show a peak that may be the harmonic of the fundamental frequency. A model is discussed which provides a kinematical interpretation of the sunspot spectrum.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints