Photospheric stellar activity cycles

Research output: Contribution to journalArticle

Abstract

Cycle lengths of active stars are derived from long-term photometric monitoring of their secular light variability. With the help of photographic data archives the lengths of the datasets are extended for HK Lac and V833 Tau. Using time-frequency analysis it is shown that the cycles are continuously changing in time. Thus, the reported cycle lengths derived by simple Fourier analysis are mean values that are valid only for a given time interval.

Original languageEnglish
Pages (from-to)283-284
Number of pages2
JournalProceedings of the International Astronomical Union
Volume2
Issue number14
DOIs
Publication statusPublished - Aug 2006

Fingerprint

stellar activity
Fourier analysis
Stars
cycles
Monitoring
frequency analysis
intervals
stars
monitoring

Keywords

  • Stars: activity
  • Stars: atmospheres
  • Stars: late-type
  • Stars: magnetic fields
  • Stars: spots

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Aerospace Engineering

Cite this

Photospheric stellar activity cycles. / Oláh, K.

In: Proceedings of the International Astronomical Union, Vol. 2, No. 14, 08.2006, p. 283-284.

Research output: Contribution to journalArticle

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KW - Stars: magnetic fields

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