A photometric study of four semi-regular variable stars

Details A photometric study of four semi-regular variable stars A photometric study of four semi-regular variable stars

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jbaa..112..349b&link_type=abstract

Journal of the British Astronomical Association, vol.112, no.6, p.349-352

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Scientific paper

A series of photometric observations of four questionable semi-regular variable stars in the V band of the Johnson system were performed using the 0.4m telescope at Extremadura University (Spain). These observations spanned 66 days for SY Leonis, W Sextantis and TZ Hydrae and 61 days for X Sextantis. Only SY Leonis appears undoubtedly classified as SRb in the GCVS4, while the other three stars are classified as semiregular variables with doubtful subclassification. In this work, the SRb classification for SY Leonis is confirmed, and a preliminary classification for the other three stars, based on the shape of their light curves, spectral types and luminosity classes is given. The study demonstrates that relatively modest local facilities can contribute to the knowledge of semi-regular variable objects.

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