The reclassification of the suspected R Coronae Borealis star SY HYI as a semiregular variable

Details The reclassification of the suspected R Coronae Borealis star SY HYI as a semiregular variable The reclassification of the suspected R Coronae Borealis star SY HYI as a semiregular variable

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989japa...10..151l&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 10, June 1989, p. 151-155.

Astronomy and Astrophysics

Astronomy

3

Astronomical Photometry, R Coronae Borealis Stars, Semiregular Variable Stars, Ubv Spectra, Light Curve, Sky Surveys (Astronomy), Stellar Magnitude

Scientific paper

The classification in the General Catalogue of Variable Stars (Kholopov et al., 1985) of Sy Hyi as a suspected R Coronae Borealis (RCB) star is called into question. Photometric and spectroscopic observations are reported which suggest that the star should be reclassified as a semiregular variable. It is pointed out that the amplitude previously found for this star is not representative of RCB stars in general, which display declines in light due to dust obscuration of 5-8 magnitudes. Sy Hyi has been reported by Shapley and Hughes (1934) to have a photographic magnitude range of 13.4-15.5.

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