High-Resolution, Wide-Field Imaging of the HL Tauri Environment in 13CO (1-0)
High-Resolution, Wide-Field Imaging of the HL Tauri Environment in 13CO (1-0)
复制标题
13CO 中 HL Tauri 环境的高分辨率、宽视场成像 (1-0)
DOI：
10.1086/309290
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
C. Briceño
中科院分区：
文献类型：
--
作者：
W. J. Welch;L. Hartmann;T. Helfer;C. Briceño
我们提出了一个高分辨率的图像，该区域附近的HL头13 CO（1-0）在一个区域的3'与比马阵列，补充数据从NRAO 12米望远镜，包括发射结构与低空间频率。我们发现了一个尺寸为~2′ × 1.′5（~0.08 × 0.06 pc）的壳层的证据，XZ Tau是已知最接近其中心的源。13 CO的地图与一个膨胀的气泡相一致，这个气泡在远离地球的一侧吹了出来。在光学散射光中可以看到气泡壁的一部分。HL Tau位于气泡壁中;疏散区域对应于HL Tau东北部反射星云中的截断。虽然人们认为一个残余的原恒星包层仍在坠落到HL Tau上，但膨胀气泡的存在使得很难解释HL Tau星周物质的几何和运动学。我们的研究结果表明，包括低空间频率发射的干涉仪地图的解释的重要性。
We present a high-resolution image of the region near HL Tau in 13CO (1-0) over a region of 3' made with the BIMA array, supplemented by data from the NRAO 12 m telescope to include emission structures with low spatial frequencies. We find evidence for a shell of dimensions ~2′ × 1.′5 (~0.08 × 0.06 pc), with XZ Tau being the closest known source to its center. The 13CO map is consistent with an expanding bubble that has blown out on the far side from earth. Portions of the bubble wall are seen in optical scattered light. HL Tau is situated in the bubble wall; the evacuated region corresponds to the truncation in the reflection nebula northeast of HL Tau. Although it is thought that a remnant protostellar envelope is still infalling onto HL Tau, the existence of the expanding bubble makes it difficult to interpret the geometry and kinematics of the HL Tau circumstellar material. Our results demonstrate the importance of including low-spatial frequency emission for the interpretation of interferometer maps.