Dramatic Spectral and Photometric Changes of Pleione (28 Tau) between 2005 November and 2007 April
Dramatic Spectral and Photometric Changes of Pleione (28 Tau) between 2005 November and 2007 April
复制标题
2005 年 11 月至 2007 年 4 月期间，一叶兰 (28 Tau) 的光谱和光度发生了巨大变化
DOI：
10.1093/pasj/59.4.l35
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
R. Hirata
中科院分区：
文献类型：
--
作者：
Ken'ichi Tanaka;K. Sadakane;S. Narusawa;H. Naito;E. Kambe;J. Katahira;R. Hirata
报道了Pleione的最新光度和光谱观测结果。Pleione显示，在2006年1月至2007年3月期间，B波段和V波段的亮度都下降了�0 m.2 5b。在此期间，在H˛和H中观察到长寿命发射分量的强度和宽度显著减小，而在这些谱线中出现了额外的外部双发射分量。在观测期间，许多金属壳线增强，并伴随着中心准发射成分。我们用双圆盘来解释这些光谱变化：未对准的旧圆盘在进动过程中的逐渐衰落，以及在恒星的赤道平面上新圆盘的形成和增长。
Recent photometric and spectroscopic observations of Pleione are reported. Pleione showed brightness declines in both the B and V bands by � 0 m .2 5b etween 2006 January and 2007 March. Significant decreases in the strengths and widths of the long-lived emission components in H˛ and Hwere 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. W ei nterpret 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.