Four-colour photometry of hydrogen-deficient stars and related objects

Details Four-colour photometry of hydrogen-deficient stars and related objects Four-colour photometry of hydrogen-deficient stars and related objects

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.190..299w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 190, Jan. 1980, p. 299-306.

Astronomy and Astrophysics

Astronomy

19

Helium, Stellar Spectrophotometry, Ultraviolet Photometry, Variable Stars, Visual Photometry, Abundance, Stellar Magnitude, Tables (Data), Ubv Spectra, Variability

Scientific paper

Stromgren uvby photometry of hydrogen deficient and helium-weak stars suggests that the 'extreme helium' (= 'hydrogen deficient') stars which have been well observed are all variable, probably in a complex way. Previously observed short-term variability of HD 160641 and long-term variability of HD 168476 are confirmed. There is no evidence for variability in the intermediate helium stars or the helium-weak stars.

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