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- W2000487708 abstract "Photoelectric monitoring has been carried out for five moderate to rapidly rotating non-T-Tauri pre-main-sequence stars in the Orion nebula cluster. In four of these stars, rotationally modulated light variations due to disturbances on the surfaces of the stars have been detected, the rotation periods ranging from 0.4-3.0 days. In one case the observed disturbance appears to have certainly been a dark spot, while in another star the variations appear to have resulted from a hot spot or spots. In two stars the type of disturbance is indeterminate. In one star the (hot) disturbed region appears to have persisted with little (or constant) drift over the stellar surface for about two years. In another, rotation periods differing as much as 22% are observed to occur over epochs of several days duration, separated by intervals of as little as 23 days, suggesting (1) that this star undergoes differential rotation and (2) that disturbances form and dissipate rapidly at different stellar latitudes and/or that rapid migration of disturbed areas over the surface of the star occurs. The radii of the stars derived from their rotation periods and spectroscopically determined rotational velocities are in reasonable agreement with those calculated from their observed absolute luminosities and effective temperatures." @default.
- W2000487708 created "2016-06-24" @default.
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- W2000487708 date "1990-07-01" @default.
- W2000487708 modified "2023-10-14" @default.
- W2000487708 title "Photoelectric observations of moderate to rapidly rotating pre-main-sequence stars in the Orion nebula cluster" @default.
- W2000487708 doi "https://doi.org/10.1086/132696" @default.
- W2000487708 hasPublicationYear "1990" @default.
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