Discovery of variability in the 'non-variable' hydrogen-deficient carbon stars

Details Discovery of variability in the 'non-variable' hydrogen-deficient carbon stars Discovery of variability in the 'non-variable' hydrogen-deficient carbon stars

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..209k&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, July 1, 1988, p. 209-214.

Other

15

Carbon Stars, Cool Stars, Stellar Color, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, Abundance, Astronomical Spectroscopy, Hydrogen, Periodic Variations

Scientific paper

The supposedly nonvariable hydrogen-deficient carbon stars HD 137613, 148839, 173409, 175893, and 182040 have been shown to be variable from photoelectric UBV and RI(KC) photometry during 1982-83 and 1986. HD 175893 is found to have a range in V of at least 0.25 mag and magnitude and color variations which are typical of RCB stars at maximum light. The other four stars show V, (B-V), and (U-B) variations of up to 0.07 mag. All of the stars studied are shown to be small amplitude variables with the possible exception of HD 173409.

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