The JCMT Legacy Survey of the Gould Belt: a first look at Orion B with HARP
The JCMT Legacy Survey of the Gould Belt: a first look at Orion B with HARP
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DOI：
10.1111/j.1365-2966.2009.15619.x
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发表时间：
2009-08
影响因子：
4.8
通讯作者：
J. Buckle;E. Curtis;J. Roberts;G. White;G. White;J. Hatchell;C. Brunt;H. Butner;B. Cavanagh-B.-Cav
中科院分区：
文献类型：
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作者：
J. Buckle;E. Curtis;J. Roberts;G. White;G. White;J. Hatchell;C. Brunt;H. Butner;B. Cavanagh-B.-Cav
古尔德带遗产巡天计划将利用詹姆斯·克拉克麦克斯韦望远镜（JCMT）上的HARP（外差阵列接收器计划）、SCUBA-2（亚毫米通用辐射热计阵列2）和POL-2（偏振计2）对附近的恒星形成区（500 pc以内）进行巡天。本文介绍了用HARP观测12 CO、13 CO和C18 O J = 3的初步数据。2朝向猎户座B中的两个区域，NGC 2024和NGC 2071。我们描述了两个云的物理特性，计算温度和不透明度利用所有三个同位素。我们发现从CO和尘埃排放的密集，充满活力的地区计算的温度之间有很好的协议。我们确定的质量和能量的云，和12 CO排放中看到的高速材料，并比较在两个云的高，低速材料的相对能量。我们提出了一个CLUMPFIND分析的13 CO冷凝。在高质量端，凝结质量函数的斜率与初始质量函数的斜率相似。
The Gould Belt Legacy Survey will survey nearby star-forming regions (within 500 pc), using HARP (Heterodyne Array Receiver Programme), SCUBA-2 (Submillimetre CommonUser Bolometer Array 2) and POL-2 (Polarimeter 2) on the James Clerk Maxwell Telescope (JCMT). This paper describes the initial data obtained using HARP to observe 12 CO, 13 CO and C 18 O J = 3! 2 towards two regions in Orion B, NGC 2024 and NGC 2071. We describe the physical characteristics of the two clouds, calculating temperatures and opacities utilizing all three isotopologues. We find good agreement between temperatures calculated from CO and from dust emission in the dense, energetic regions. We determine the mass and energetics of the clouds, and of the high-velocity material seen in 12 CO emission, and compare the relative energetics of the high- and low-velocity material in the two clouds. We present a CLUMPFIND analysis of the 13 CO condensations. The slope of the condensation mass functions, at the high-mass ends, is similar to the slope of the initial mass function.