Article in PDF

"Peremennye Zvezdy", Prilozhenie, vol. 8, N 6 (2008)

Pleione (BU Tau): IR Fading of the Star in 1999 - 2007

O. Taranova, V. Shenavrin, A. Nadjip
Sternberg Astronomical Institute, Moscow State University, Russia

ISSN 2221–0474

Received:   17.02.2008;   accepted:   21.02.2008
(E-mail for contact: taranova@sai.msu.ru)

---

Star Name: BU Tau , HD 23862 Coordinates (J2000): 03 49 11.22, +24 08 12.2 Variability type: GCAS;   Limits, System: 5.05-5.27 (J);   Spectrum: B8Vne Period: Epoch: JD

Remarks:

We report on a fading of Pleione in the near infrared (1.25-3.5 microns) in 1999 - 2007. This IR fading was the first one during our observations of the star between 1994 and 2007. Pleione showed brightness declines in J, H, K, and L bands by ~0.20 - 0.25 mag between 1999 December and 2007 November. The Figure displays variations of the star's J- and L-band brightness in 1994 - 2007. The vertical line approximately corresponds to the beginning of the decline.