用弧分微开尔文成像仪观测到的暗云LDN 1111中的过量辐射
An excess of emission in the dark cloud LDN 1111 with the Arcminute Microkelvin Imager
摘要：
我们目前的观测林德的黑暗星云LDN 1111在微波频率在14.6和17.2千兆赫之间的弧分微开尔文成像仪（AMI）。我们发现在这个频段的发射超过热自由-自由频谱外推的数据在1.4 GHz的匹配的紫外线覆盖范围。该过量超过预测排放> 15 sigma。我们使用Drain & Lazarian（1998 a）的旋转尘埃模型拟合了测量光谱，发现最佳拟合模型参数与Visser等人（2001）从该天体的Scuba数据中得出的参数吻合得很好。
英文摘要：
We present observations of the Lynds' dark nebula LDN 1111 made at microwave frequencies between 14.6 and 17.2 GHz with the Arcminute Microkelvin Imager (AMI). We find emission in this frequency band in excess of a thermal free--free spectrum extrapolated from data at 1.4 GHz with matched uv-coverage. This excess is > 15 sigma above the predicted emission. We fit the measured spectrum using the spinning dust model of Drain & Lazarian (1998a) and find the best fitting model parameters agree well with those derived from Scuba data for this object by Visser et al. (2001).
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