标题： 英仙座区域的异常微波辐射的VSA观测 显示英文标题

标题： VSA Observations of the Anomalous Microwave Emission in the Perseus Region

摘要： 在英仙座区域的尘埃特征 G159.6--18.5 曾经使用 COSMOSOMAS 实验\citep{Watson:05}在角尺度为$\approx$1$^{\circ}$上观测过，并发现表现出异常的微波发射。 我们展示了使用 Very Small Array (VSA) 在 33 GHz 频率下对该尘埃特征的新观测结果，以帮助增加对此异常发射性质的理解。 在 VSA 观测的角尺度$\approx$10 -- 40$^{\prime}$下，G159.6--18.5 包含五个不同的成分，每个成分都被单独分析。 这五个成分都被发现具有 33 GHz 的发射过剩，并且被发现与远红外发射高度相关。 我们提供了证据表明这些紧凑成分中的每一个都表现出异常发射，这与非常小的快速旋转尘粒的电偶极发射一致。 这些成分贡献了$\approx$10% 的弥散扩展发射的流量密度，由 COSMOSOMAS 检测到，并发现它们具有相似的无线电发射率。 显示英文摘要

摘要： The dust feature G159.6--18.5 in the Perseus region has previously been observed with the COSMOSOMAS experiment \citep{Watson:05} on angular scales of $\approx$ 1$^{\circ}$, and was found to exhibit anomalous microwave emission. We present new observations of this dust feature, performed with the Very Small Array (VSA) at 33 GHz, to help increase the understanding of the nature of this anomalous emission. On the angular scales observed with the VSA ($\approx$ 10 -- 40$^{\prime}$), G159.6--18.5 consists of five distinct components, each of which have been individually analysed. All five of these components are found to exhibit an excess of emission at 33 GHz, and are found to be highly correlated with far-infrared emission. We provide evidence that each of these compact components have anomalous emission that is consistent with electric dipole emission from very small, rapidly rotating dust grains. These components contribute $\approx$ 10 % to the flux density of the diffuse extended emission detected by COSMOSOMAS, and are found to have a similar radio emissivity.