Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..83..287b&link_type=abstract
Astrophysics and Space Science, vol. 83, no. 1-2, Apr. 1982, p. 287-310. Research supported by the Consiglio Nazionale delle Ri
Astronomy and Astrophysics
Astrophysics
15
B Stars, O Stars, Stellar Evolution, Subdwarf Stars, Variable Stars, Electrophotometers, Hydrogen, Light Curve, Tables (Data), Variability
Scientific paper
The evolutionary status of hydrogen-poor stars is assessed. Photoelectric observations of six objects are reported as a first step in a long-term project devoted to a search for variability of a large sample of hydrogen-poor stars. The observed stars exhibit phenomena of microvariability with an amplitude of the order of 0.1m or less. Two extreme helium stars are examined: a period in the range of 0.162d-0.164d is found for BD + 10 deg 2179 with P = 0.1079962d for BD + 13 deg 3324. It is noted that the mass-losing O subdwarf (sdO) BD = + 37 deg 443 exhibits short-term fluctuations with a time-scale of several minutes and long-term variations on a scale of months.
Bartolini Corrado
Bonifazi A.
Dantona F.
Fusi Pecci Flavio
Oculi L.
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