The determination of the rotational periods of rapidly oscillating AP stars from their mean light variations. I - The rapidly oscillating AP star, HD 6532; the F2 IV/V star, HD 6491; and the He-weak B star, HD 5737 (HR 280, Alpha Scl

Details The determination of the rotational periods of rapidly oscillating AP stars from their mean light variations. I - The rapidly oscillating AP star, HD 6532; the F2 IV/V star, HD 6491; and the He-weak B star, HD 5737 (HR 280, Alpha Scl The determination of the rotational periods of rapidly oscillating AP stars from their mean light variations. I - The rapidly oscillating AP star, HD 6532; the F2 IV/V star, HD 6491; and the He-weak B star, HD 5737 (HR 280, Alpha Scl

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..141k&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Sept. 1, 1987, p. 141-158. Research supported by t

Astronomy and Astrophysics

Astronomy

14

A Stars, Abundance, B Stars, Radiant Flux Density, Stellar Oscillations, Stellar Rotation, Helium, Resonant Frequencies, Spectrum Analysis, Stellar Magnetic Fields, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

The authors have obtained UBVRI mean light observations of HD 6532, HD 6491 and HD 5737 with respect to the F5IV comparison star HD 7259. A frequency analysis of the HD 6532 data shows that it has a rotation period of Prot = 1.9455±0.0019 day. The authors have discovered that HD 6491 has sinusoidal light variations with a period of either 0.82841±0.00011 day, or twice that period, or, slightly less likely, 4.868±0.004 day. No unequivocal variation was found in HD 5737 although a period of 58.8 day is consistent with the data and previous magnetic observations.

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