The Near-Infrared Spectrum of the Brown Dwarf Gliese 229B
The Near-Infrared Spectrum of the Brown Dwarf Gliese 229B
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棕矮星 Gliese 229B 的近红外光谱
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
G. Sloan
中科院分区：
文献类型：
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作者：
T. Geballe;S. Kulkarni;C. Woodward;G. Sloan
利用英国红外望远镜上的CGS4设备光谱仪，获得了棕矮星Gliese 229B的中分辨率1.0 ~ 2.5 μm光谱。除了在早期的低分辨率观测中看到的广谱结构外，新的光谱还揭示了大量的吸收线，其中许多可以识别为水蒸气。水和甲烷在该天体的近红外光谱中都表现出很强的吸收体。Gl 229B的几个光谱特征可以归因于甲烷，这些特征与巨大的外行星，特别是土卫六的反射相匹配。
A medium-resolution 1.0-2.5 μm spectrum of the brown dwarf Gliese 229B has been obtained using the facility spectrometer CGS4 on the United Kingdom Infrared Telescope. In addition to the broad spectral structure seen in earlier low-resolution observations, the new spectrum reveals a large number of absorption lines, many of which can be identified with water vapor. Water and methane are both shown to be strong absorbers in the near-infrared spectrum of the object. Several spectral features in Gl 229B that are attributable to methane match ones seen in reflection in the giant outer planets and, in particular, Titan.