Light and colour variations in the extremely hydrogen-deficient binary CPD-58 deg 2721

Details Light and colour variations in the extremely hydrogen-deficient binary CPD-58 deg 2721 Light and colour variations in the extremely hydrogen-deficient binary CPD-58 deg 2721

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.229..269m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 229, Nov. 15, 1987, p. 269-284.

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5

Binary Stars, Hydrogen, Periodic Variations, Stellar Color, Stellar Composition, Stellar Luminosity, Light Curve, Spectrum Analysis, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

Strömgren and UBVRI photometry of the extremely hydrogen-deficient binary star CPD -58°2721 (LSS 1922) is presented. Light and colour variations are present with amplitudes 0.17 mag in V and 0.07 mag in (U-B) and (u-b). A detailed frequency analysis of the complex light curve was carried out and possible interpretations of the light curve are discussed. The lack of any obvious evidence for eclipse-related variations during this interval suggests that CPD -58°2721 is not an eclipsing binary. Its photometric behaviour is similar to that of another hydrogen-deficient binary υ Sgr for which variations on a timescale of 20 day have been reported recently.

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