The multimode pulsation of the δ Scuti star V784 Cassiopeae

L. L. Kiss, A. Derekas, E. J. Alfaro, I. B. Bíró, B. Csák, R. Garrido, K. Szatmáry, J. R. Thomson

Research output: Contribution to journalArticle

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Abstract

We present an analysis of new Johnson and Strömgren photometric and medium-resolution spectroscopic observations of the δ Scuti type variable star V784 Cassiopeae. The data were obtained in three consecutive years between 1999 and 2001. The period analysis of the light curve resulted in the detection of four frequencies ranging from 9.15 d-1 to 15.90 d-1 while there is a suggestion for more, unresolved frequency components, too. The mean Strömgren indices and Hipparcos parallax were combined to calculate the following physical parameters: eff> = 7100 ± 100 K, log g = 3.8 ± 0.1, Mbol = 1m.50 ± 0m.15. The position of the star in the HR diagram was used to derive evolutionary mass and age yielding to a consistent picture of an evolved δ Scuti star with a mixture of radial plus non-radial modes.

Original languageEnglish
Pages (from-to)97-106
Number of pages10
JournalAstronomy and Astrophysics
Volume394
Issue number1
Publication statusPublished - Oct 2002

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Hertzsprung-Russell diagram
stars
variable stars
parallax
light curve
suggestion
diagram
analysis
index
detection
parameter

Keywords

  • δ Sct
  • Stars: fundamental parameters
  • Stars: individual: V784 Cas
  • Stars: oscillations

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Kiss, L. L., Derekas, A., Alfaro, E. J., Bíró, I. B., Csák, B., Garrido, R., ... Thomson, J. R. (2002). The multimode pulsation of the δ Scuti star V784 Cassiopeae. Astronomy and Astrophysics, 394(1), 97-106.

The multimode pulsation of the δ Scuti star V784 Cassiopeae. / Kiss, L. L.; Derekas, A.; Alfaro, E. J.; Bíró, I. B.; Csák, B.; Garrido, R.; Szatmáry, K.; Thomson, J. R.

In: Astronomy and Astrophysics, Vol. 394, No. 1, 10.2002, p. 97-106.

Research output: Contribution to journalArticle

Kiss, LL, Derekas, A, Alfaro, EJ, Bíró, IB, Csák, B, Garrido, R, Szatmáry, K & Thomson, JR 2002, 'The multimode pulsation of the δ Scuti star V784 Cassiopeae', Astronomy and Astrophysics, vol. 394, no. 1, pp. 97-106.
Kiss LL, Derekas A, Alfaro EJ, Bíró IB, Csák B, Garrido R et al. The multimode pulsation of the δ Scuti star V784 Cassiopeae. Astronomy and Astrophysics. 2002 Oct;394(1):97-106.
Kiss, L. L. ; Derekas, A. ; Alfaro, E. J. ; Bíró, I. B. ; Csák, B. ; Garrido, R. ; Szatmáry, K. ; Thomson, J. R. / The multimode pulsation of the δ Scuti star V784 Cassiopeae. In: Astronomy and Astrophysics. 2002 ; Vol. 394, No. 1. pp. 97-106.
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