The triple-mode pulsating variable V823 Cassiopeiae

J. Jurcsik, B. Szeidl, M. Váradi, A. Henden, Z. Hurta, B. Lakatos, K. Posztobányi, P. Klagyivik, Á Sódor

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Using extended multicolour CCD photometry of the triple-mode radial pulsator V823 Cas we studied the properties of the coupling frequencies invoked by nonlinear processes. Our results support that a resonance connection affects the mode coupling behaviour. The P1/P0 period ratio of V823 Cas has an "out of range" value if compared with the period ratios of the known double mode pulsators, while the P2/P1 period ratio is normal. The periods and period ratios cannot be consistently interpreted without conflict with pulsation and/or evolution models. We describe this failure with the suggestion that at present, the periods of V823 Cas are in a transient, resonance affected state, thus do not reflect the true parameters of the object. The anomalous period change behaviour of the fundamental and second overtone modes supports this idea. We have also raised the possibility that a f0 + f2 = 2f i resonance may act in triple mode pulsators.

Original languageEnglish
Pages (from-to)617-625
Number of pages9
JournalAstronomy and Astrophysics
Volume445
Issue number2
DOIs
Publication statusPublished - Jan 2006

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coupled modes
suggestion
photometry
charge coupled devices
harmonics
parameter
conflict

Keywords

  • Stars: evolution
  • Stars: individual: V823 Cas
  • Stars: oscillations
  • Stars: variables: Cepheids
  • Techniques: photometric

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

The triple-mode pulsating variable V823 Cassiopeiae. / Jurcsik, J.; Szeidl, B.; Váradi, M.; Henden, A.; Hurta, Z.; Lakatos, B.; Posztobányi, K.; Klagyivik, P.; Sódor, Á.

In: Astronomy and Astrophysics, Vol. 445, No. 2, 01.2006, p. 617-625.

Research output: Contribution to journalArticle

Jurcsik, J, Szeidl, B, Váradi, M, Henden, A, Hurta, Z, Lakatos, B, Posztobányi, K, Klagyivik, P & Sódor, Á 2006, 'The triple-mode pulsating variable V823 Cassiopeiae', Astronomy and Astrophysics, vol. 445, no. 2, pp. 617-625. https://doi.org/10.1051/0004-6361:20052876
Jurcsik, J. ; Szeidl, B. ; Váradi, M. ; Henden, A. ; Hurta, Z. ; Lakatos, B. ; Posztobányi, K. ; Klagyivik, P. ; Sódor, Á. / The triple-mode pulsating variable V823 Cassiopeiae. In: Astronomy and Astrophysics. 2006 ; Vol. 445, No. 2. pp. 617-625.
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