SIMBAD references

2001A&A...378..466O - Astronomy and Astrophysics, volume 378, 466-476 (2001/11-1)

Four new subdwarf B pulsators.

OSTENSEN R., HEBER U., SILVOTTI R., SOLHEIM J.-E., DREIZLER S. and EDELMANN H.

Abstract (from CDS):

We report the detection of short period oscillations in the sdB stars HS0039+4302, HS0444+0408, HS1824+5745 and HS2151+0857 from time-series photometry made at the Nordic Optical Telescope (NOT) of a sample of 55 candidates. Hence these four hot subdwarfs are new members of the EC14026 class of pulsating sdB stars. HS0039+4302 is a multi-mode pulsator with at least four distinct periods in the range between 182 and 234s, and amplitudes up to 8mma. HS0444+0408 shows one dominant pulsation at 137s (A∼12mma) and a second weaker pulsation at 170s (A∼3mma). For HS1824+5745 we find a single period of 139s with an amplitude of about 5mma. HS2151+0857 shows four periods in the range 129-151 s with amplitudes between 2 and 5mma. Our NLTE model atmosphere analysis of the time-averaged optical spectra place all stars well within the theoretical sdBV instability strip.

Abstract Copyright:

Journal keyword(s): subdwarfs - stars: oscillations - stars: individual: HS 0039+4302, HS 0444+0408 (read: HS 0444+0458), HS 1824+5745, HS 2151+0857

CDS comments: In the paper, read "HS 0444+0458" instead of "HS 0444+0408"

Simbad objects: 13

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2022.08.08-06:13:29

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