The pulsating hydrogen-deficient star LSS 3184 (BX Cir)

Details The pulsating hydrogen-deficient star LSS 3184 (BX Cir) The pulsating hydrogen-deficient star LSS 3184 (BX Cir)

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.310.1119k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 310, Issue 4, pp. 1119-1127.

Other

16

Stars: Chemically Peculiar, Stars: Individual: Lss 3184, Stars: Oscillations, Stars: Variables: Other

Scientific paper

We present extensive photometry and spectroscopy of the extremely hydrogen-deficient star, LSS 3184, recently discovered to be a rapid variable (period ~0.1066d) strikingly similar to V652 Her. Over 95h of photometry confirms the reported variability, which is of rather low amplitude (ΔV~0.03mag), defines the light curve with greater precision and establishes a much more accurate ephemeris (period ~0.1065784d) to form a basis for detecting period change. Attention is drawn to the usefulness of a period-finding technique that fits harmonic components to the photometric observations. Spectroscopy shows a peak-to-peak variation in radial velocity of about 30kms-1, which, when combined with the photometric observations, confirms the pulsational nature of the variability and strongly indicates that the pulsations are radial in nature.

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