Epsilon Indi Ba，Bb：最近已知褐矮星的光谱研究
Epsilon Indi Ba, Bb: a spectroscopic study of the nearest known brown dwarfs
摘要：
发现了Epsanitary Indi Ba和Bb，这是一个附近的双褐矮星系统，有一个主序星伴星，允许一个协调一致的运动来确定两个T矮星的物理参数，为测试大气和演化模型提供基准。最近的一些观察表明，在低质量和中等年龄的模型可能无法反映现实，但很少有结论性的测试。我们正在对这些最近的已知褐矮星进行全面的表征，以便对冷场矮星的模型进行限制。我们目前的宽带测光从V-到M-波段和个人光谱的两个组件从0.6-5.1微米的分辨率高达R=5000。自定义分析轮廓拟合例程被实现以提取分离0.7弧秒的两个组分的混合光谱和光度测定。我们确认光谱类型为T1和T6，值得注意的是，我们没有在更大质量的物体中检测到6708 A的锂，这可能表明系统的年龄和组件的质量。
英文摘要：
The discovery of Epsilon Indi Ba and Bb, a nearby binary brown dwarf system with a main-sequence companion, allows a concerted campaign to characterise the physical parameters of two T dwarfs providing benchmarks against which atmospheric and evolutionary models can be tested. Some recent observations suggest the models at low mass and intermediate age may not reflect reality with, however, few conclusive tests. We are carrying out a comprehensive characterisation of these, the nearest known brown dwarfs, to allow constraints to be placed upon models of cool field dwarfs. We present broadband photometry from the V- to M-band and the individual spectrum of both components from 0.6-5.1 microns at a resolution of up to R=5000. A custom analytic profile fitting routine was implemented to extract the blended spectra and photometry of both components separated by 0.7 arcsec. We confirm the spectral types to be T1 and T6, and notably, we do not detect lithium at 6708A in the more massive object which may be indicative both of the age of the system and the mass of the components.
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