The JCMT Plane Survey: early results from the l = 30° field
The JCMT Plane Survey: early results from the l = 30° field
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JCMT 平面测量：l = 30° 场的早期结果
DOI：
10.1093/mnras/stv1833
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发表时间：
2015
影响因子：
4.8
通讯作者：
Moore T
中科院分区：
文献类型：
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作者：
Moore T
作为JCMT遗产巡天计划的一部分，我们介绍了JCMT（詹姆斯·克拉克麦克斯韦望远镜）平面巡天（JPS）的早期结果，该巡天使用SCUBA-2（亚毫米普通用户测辐射热计阵列2）在850 μm连续谱中对北方内银道面进行了巡天。数据来自于100 = 30的测量区域，其中包含了双星形成区W 43和G29。96，在完成约40%的观察后进行分析。在对波束区域进行平滑处理后，发现像素到像素的噪声为19 mJy波束-1，最终勘测中的投影等效噪声水平预计约为10 mJy波束-1。使用FELLWALKER方法进行紧凑源的初始提取，导致检测到1029个高于5σ表面亮度阈值的源。这些数据的完整性极限估计约为0.2 Jy束流-1（峰值通量密度）和0.8 Jy（积分通量密度），因此在这个相对拥挤的调查部分，可能已经被源混淆所主导。提取的紧凑型源的通量密度是一致的匹配检测在较浅的APEX（阿塔卡马探路者实验）望远镜大面积调查的星系（ATLASGAL）调查。我们分析了在W 43恒星形成复合体中检测到的团块的维里和演化状态，发现它们比银河系平面的平均年龄更年轻。
We present early results from the JCMT (James Clerk Maxwell Telescope) Plane Survey (JPS), which has surveyed the northern inner Galactic plane between longitudes ℓ= 7 and ℓ= 63 in the 850-μm continuum with SCUBA-2 (Submm Common-User Bolometer Array 2), as part of the JCMT Legacy Survey programme. Data from the ℓ= 30 survey region, which contains the massive-star-forming regions W43 and G29. 96, are analysed after approximately 40 per cent of the observations had been completed. The pixel-to-pixel noise is found to be 19 mJy beam− 1 after a smooth over the beam area, and the projected equivalent noise levels in the final survey are expected to be around 10 mJy beam− 1. An initial extraction of compact sources was performed using the FELLWALKER method, resulting in the detection of 1029 sources above a 5σ surface-brightness threshold. The completeness limits in these data are estimated to be around 0.2 Jy beam− 1 (peak flux density) and 0.8 Jy (integrated flux density) and are therefore probably already dominated by source confusion in this relatively crowded section of the survey. The flux densities of extracted compact sources are consistent with those of matching detections in the shallower APEX (Atacama Pathfinder Experiment) Telescope Large Area Survey of the Galaxy (ATLASGAL) survey. We analyse the virial and evolutionary state of the detected clumps in the W43 star-forming complex and find that they appear younger than the Galactic-plane average.