Periodic variations in the colours of the classical T Tauri star RW Aur A
Astronomy Division, PO Box 3000, 90014 University of Oulu, Finland
2 Tartu Observatory, 61602 Tõravere, Estonia
Corresponding author: P. P. Petrov, Peter.Petrov@Oulu.Fi
Accepted: 18 June 2001
The classical T Tauri star RW Aur A is an irregular variable with a large amplitude in all photometric bands. In an extended series of photometric data we found small-amplitude periodic variations in the blue colours of the star, with a period of . The period was relatively stable over several years. The amplitude of the periodic signal is in , in , and about in and . No periodicity was found in the V magnitude. The relevance of this photometric period to the recently discovered periodicity in spectral features of the star is discussed, and the hypothesis of a hot spot is critically considered.
Key words: stars: individual: RW Aur A / stars: pre-main sequence / stars: variables: general / methods: statistical
© ESO, 2001