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Astron. Astrophys. 362, 595-598 (2000)

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Complicated pulsation in the [FORMULA] Scuti variable 59 Aurigae

Li Zhiping

Beijing Astronomical Observatory, Chinese Academy of Sciences, 100012 Beijing, P.R. China (lizhi@bao.ac.cn)

Received 7 February 2000 / Accepted 3 July 2000


Eight-night photoelectric photometric observations through v and y bands confirm the complicated pulsation of [FORMULA] Scuti variable 59 Aurigae. Power spectra of light curves show multi-period pulsation behavior, and eight pulsation frequencies [FORMULA]=6.8283, [FORMULA]=6.3179, [FORMULA]=5.0074, [FORMULA]=5.9535, [FORMULA]=4.3285, [FORMULA]=5.6854, [FORMULA]=9.0206 and [FORMULA]=8.6260 cycles per day are identified. After subtraction of the best eight frequency solution, there are still more peaks that can be distinguished in the residual power spectrum. The eight frequency solution covers the frequency solution of Gupta (1980) and fits his data. The close frequency distribution supports a non-radial pulsation identification. Pulsation constant values of eight modes are distributed in a wide range from [FORMULA] to [FORMULA] mode.

Key words: stars: variables: ffi Sct – stars: oscillations – stars: fundamental parameters – stars: individual: 59 Aur

© European Southern Observatory (ESO) 2000

Online publication: October 24, 2000