| Issue |
A&A
Volume 375, Number 3, September 2001
|
|
|---|---|---|
| Page(s) | 977 - 981 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20010883 | |
| Published online | 15 September 2001 | |
Periodic variations in the colours of the classical T Tauri star RW Aur A
1
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
Received:
19
April
2001
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
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