A photoelectric investigation of light variability in AP stars

Details A photoelectric investigation of light variability in AP stars A photoelectric investigation of light variability in AP stars

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26as...46..151h&link_type=abstract

Astronomy and Astrophysics Supplement Series, vol. 46, Oct. 1981, p. 151-170.

Astronomy and Astrophysics

Astrophysics

31

A Stars, Peculiar Stars, Stellar Luminosity, Stellar Rotation, Variable Stars, Electrophotometry, Reference Stars, Stellar Magnitude, Stellar Spectrophotometry

Scientific paper

A study of the light variability of a number of peculiar A stars, mainly in Stromgren colors u and v and in peculiarity index Delta-a, leads to the proposal of the following light variability periods: (1) HD 5601, 1.11 days; (2) HD 19712, 2.19 days; (3) HD 30849, 15.86 days; (4) HD 38823, 8.64 days; (5) HD 53116, 11.98 or 18.10 days; (6) HD 56022, 0.92 days; and (7) HD 81009, 33.97 days. In addition, evidence is given for variability of HD 94660 on a time scale on the order of months or years, and it is shown that the rotation period proposed by Borra and Landstreet (1980) for HD 25267 is not supported by the light variations observed. The character of Delta-a variability is discussed.

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