Blazhko effect in Cepheids and RR Lyrae stars

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The Blazhko effect is the conspicuous amplitude and phase modulation of the pulsation of RR Lyrae stars that was discovered in the early 20th century. The field of study of this mysterious modulation has recently been invigorated thanks to the space photometric missions providing long, uninterrupted, ultra-precise time-series data. In this paper I give a brief overview of the new observational findings related to the Blazhko effect, such as extreme modulations, irregular modulation cycles and additional periodicities. I argue that these findings together with dedicated ground-based efforts provide us now with a fairly complete picture and a good starting point to theoretical investigations. Indeed, new, unpredicted dynamical phenomena have been discovered in Blazhko RR Lyrae stars, such as period doubling, high-order resonances, three-mode pulsation and low-dimensional chaos. These led to the proposal of a new explanation to this century-old enigma, namely a high-order resonance between radial modes. Along these lines I present the latest efforts and advances from the theoretical point of view. Lastly, amplitude variations in Cepheids are discussed.

Original languageEnglish
Title of host publicationProceedings of the International Astronomical Union
Pages241-248
Number of pages8
Volume9
EditionS301
DOIs
Publication statusPublished - 2014

Publication series

NameProceedings of the International Astronomical Union
NumberS301
Volume9
ISSN (Print)17439213
ISSN (Electronic)17439221

Fingerprint

modulation
stars
period doubling
space missions
phase modulation
chaos
proposals
periodic variations
cycles

Keywords

  • α UMi
  • Blazhko effect
  • hydrodynamics
  • Kepler
  • pulsation
  • stars: individual: RR Lyr
  • stars: variables: Cepheids
  • stars: variables: RR Lyrae
  • V445 Lyr
  • V473 Lyr

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Szabó, R. (2014). Blazhko effect in Cepheids and RR Lyrae stars. In Proceedings of the International Astronomical Union (S301 ed., Vol. 9, pp. 241-248). (Proceedings of the International Astronomical Union; Vol. 9, No. S301). https://doi.org/10.1017/S1743921313014397

Blazhko effect in Cepheids and RR Lyrae stars. / Szabó, R.

Proceedings of the International Astronomical Union. Vol. 9 S301. ed. 2014. p. 241-248 (Proceedings of the International Astronomical Union; Vol. 9, No. S301).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Szabó, R 2014, Blazhko effect in Cepheids and RR Lyrae stars. in Proceedings of the International Astronomical Union. S301 edn, vol. 9, Proceedings of the International Astronomical Union, no. S301, vol. 9, pp. 241-248. https://doi.org/10.1017/S1743921313014397
Szabó R. Blazhko effect in Cepheids and RR Lyrae stars. In Proceedings of the International Astronomical Union. S301 ed. Vol. 9. 2014. p. 241-248. (Proceedings of the International Astronomical Union; S301). https://doi.org/10.1017/S1743921313014397
Szabó, R. / Blazhko effect in Cepheids and RR Lyrae stars. Proceedings of the International Astronomical Union. Vol. 9 S301. ed. 2014. pp. 241-248 (Proceedings of the International Astronomical Union; S301).
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