Is β Pictoris an Active Star?
Is β Pictoris an Active Star?
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画座β是活跃恒星吗？
DOI：
10.1086/323005
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
H. Moos
中科院分区：
文献类型：
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作者：
M. Deleuil;J. Bouret;A. D. Étangs;A. Roberge;A. Vidal;M. André;W. Blair;P. Feldman;R. Ferlet;S. Friedman;H. Moos
我们提出了由远紫外光谱探测卫星所揭示的绘形星β的第一个发射在线光谱。在极低的连续水平之上，由于高度电离的C III和O VI，可以很好地探测到宽的发射线。在β Pic光谱中出现这样的谱线就证明了恒星环境的复杂，包括密集和炎热的区域。我们认为这些光谱特征可能来自类似太阳的扩展色球层或磁层吸积。
We present the first emission-line spectrum of β Pictoris, as revealed by the Far Ultraviolet Spectroscopic Explorer satellite. Broad emission lines due to highly ionized species, C III and O VI, are well detected above the very low continuum level. The mere presence of such lines in the β Pic spectrum is evidence of a complex stellar environment, including dense and hot regions. We argue that these spectral features may originate from a solar-like extended chromosphere or from magnetospheric accretion.