SIMBAD references

2007PASJ...59L..35T - Publ. Astron. Soc. Jap., 59, L35-L39 (2007/August-0)

Dramatic spectral and photometric changes of Pleione (28 Tau) between 2005 November and 2007 April.

TANAKA K., SADAKANE K., NARUSAWA S.-Y., NAITO H., KAMBE E., KATAHIRA J.-I. and HIRATA R.

Abstract (from CDS):

begin{HTML}Recent photometric and spectroscopic observations of Pleione are reported. Pleione showed brightness declines in both the B and V bands by ∼ 0.m25 between 2006 January and 2007 March. Significant decreases in the strengths and widths of the long-lived emission components in Hα and Hb were observed during this period, while additional outer double-emission components appeared in these lines. Many metallic shell lines strengthened during the observation period, being accompanied by central quasi-emission components. We interpret these spectral changes in terms of a double disk: the progressive decline of a misaligned old disk in due course of precession and the formation and growth of a new disk in the star's equatorial plane.

Abstract Copyright:

Journal keyword(s): Stars: atmosphere - Stars: Be - Stars: emission line - Stars: individual: 28 Tau - Stars: photometry - Stars: spectroscopy

Simbad objects: 10

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2020.02.20-14:40:12

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