Spectrally Dispersed K-Band Interferometric Observations of Herbig Ae/Be Sources: Inner Disk Temperature Profiles
Spectrally Dispersed K-Band Interferometric Observations of Herbig Ae/Be Sources: Inner Disk Temperature Profiles
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Herbig Ae/Be 源的光谱色散 K 波段干涉观测：内盘温度分布
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
R. Akeson
中科院分区：
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作者：
Joshua A Eisner;Eugene Chiang;Benjamin F. Lane;R. Akeson
我们使用光谱色散近红外干涉数据来约束11个赫比格Ae/Be源的亚AU大小的区域的温度分布。我们发现，一个单一的温度环不能很好地再现数据。相反，优选包含径向温度梯度的模型。这些梯度可能出现在尘埃盘中，或者可能反映具有不同温度和空间分布的单独的气体和尘埃成分。我们的模型与宽带光谱能量分布的比较表明后一种解释。这些数据支持这样的观点，即赫比格Ae/Be源的近红外辐射来自于亚AU大小的盘区域中的热拱星尘埃和气体。有趣的是，我们推导出的温度梯度在更高质量恒星周围的圆盘中系统性地更陡峭。然而，尚不清楚这是否反映了个别组成部分内的相对粉尘/气体贡献或梯度的趋势。
We use spectrally dispersed near-IR interferometry data to constrain the temperature profiles of sub-AU-sized regions of 11 Herbig Ae/Be sources. We find that a single-temperature ring does not reproduce the data well. Rather, models incorporating radial temperature gradients are preferred. These gradients may arise in a dusty disk, or may reflect separate gas and dust components with different temperatures and spatial distributions. Comparison of our models with broadband spectral energy distributions suggests the latter explanation. The data support the view that the near-IR emission of Herbig Ae/Be sources arises from hot circumstellar dust and gas in sub-AU-sized disk regions. Intriguingly, our derived temperature gradients appear systematically steeper for disks around higher mass stars. It is not clear, however, whether this reflects trends in relative dust/gas contributions or gradients within individual components.