The Silicates in the Disk of beta Pictoris
The Silicates in the Disk of beta Pictoris
复制标题
绘架β盘中的硅酸盐
DOI：
10.1086/173405
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
R. Russell
中科院分区：
文献类型：
--
作者：
R. Knacke;S. Fajardo;C. Telesco;J. Hackwell;D. Lynch;R. Russell
我们获得了β Pic星周盘中粒子的中分辨率（R_（50））红外（2.6-13.5 μm）谱。10 μm附近的硅酸盐尘埃特征比星际和大多数拱星发射特征更宽，包含更多的结构。β Pic中的硅酸盐特征与哈雷彗星、布拉德菲尔德1987 s和利维1990 XX中的硅酸盐特征非常相似，后者具有结晶硅酸盐的特征。这一结果支持了基于IRAS结果的推论，即彗星体补充了β Pic盘中的颗粒。尘埃盘和尘埃颗粒的详细模型被用来推导出合理的尘埃盘温度和密度梯度
We have obtained intermediate-resolution (R≃50) infrared (2.6-13.5 μm) spectra of the particles in the circumstellar disk of β Pic. The silicate dust feature near 10 μm is broader and contains more structure than interstellar and most circumstellar emission features. The silicate feature in β Pic is remarkably similar to those in comets Halley, Bradfield 1987s, and Levy 1990 XX which have emission features characteristic of crystalline silicates. This result supports the inference based on IRAS results that cometary bodies resupply the grains in the β Pic disk. Detailed models of the dust disk and grains are used to derive plausible disk temperature and density gradients