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À propos de : PG 1613+426: A new sdB pulsator        

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  • PG 1613+426: A new sdB pulsator
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  • We report the detection of short period oscillations in the hot subdwarf B (sdB) star PG 1613+426 from time-series photometry carried out with the 91-cm Cassegrain telescope of the Catania Astrophysical Observatory. This star, which is brighter than the average of the presently known sdB pulsators, with $B = 14.14$ mag, has $T_{\rm eff}=34\,400~{\rm K}$ and $\log g = 5.97$, its position is near the hot end of the sdB instability strip, and it is a pulsator with a well observed peak in the power spectrum at $144.18\pm 0.06\,\rm s$. This star seems to be well suited for high precision measurements, which could detect a possible multi-mode pulsation behaviour.
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  • aa3218
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  • © ESO, 2003
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