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There is a well-developed, observationally-tested paradigm for accretion flows around young low-mass stars, consisting of infall to a rotating circumstellar disk, followed by accretion through the disk onto the central star. This basic picture may apply to higher-mass stars as well, but this has not been convincingly demonstrated yet, largely due to observational limitations. While it is clear that...
A detailed analysis of an extensive collection of minima of Beta Lyrae was performed. After removing the effect of the orbital period increase, we applied the Fourier analysis to the O-C residuals. The most prominent periodicity is 283 days with amplitude of about 0.05 days. We confirm the period found by Van Hamme, Wilson & Guinan [1995, Astron. J., 110, 1350] from analysis of the photometric...
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