SYNTHETIC OBSERVATIONS OF THE EVOLUTION OF STARLESS CORES IN A MOLECULAR CLOUD SIMULATION: COMPARISONS WITH JCMT DATA AND PREDICTIONS FOR ALMA
SYNTHETIC OBSERVATIONS OF THE EVOLUTION OF STARLESS CORES IN A MOLECULAR CLOUD SIMULATION: COMPARISONS WITH JCMT DATA AND PREDICTIONS FOR ALMA
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分子云模拟中无星核心演化的综合观测：与 JCMT 数据的比较和对 ALMA 的预测
DOI：
10.1088/0004-637x/783/1/60
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Schnee
中科院分区：
文献类型：
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作者：
S. Mairs;D. Johnstone;S. Offner;S. Schnee
多年来，解释无星核心的性质一直是星星形成的一个突出目标。为了表征这些对象的演化阶段，我们进行综合观测的湍流分子云的数值模拟。我们发现，几乎所有我们探测到的核心都与细丝有关，并最终形成原恒星。我们的结论是，观察到的无星核心，出现牛仔不稳定的只是略大于各自的牛仔质量（在三个因素）。我们注意到，单碟观测，如詹姆斯克拉克麦克斯韦望远镜进行的，似乎错过了重要的核心结构在小尺度上，因为光束平均。最后，我们预测，阿塔卡马大型毫米阵列周期1的干涉观测将解决重要的小尺度结构，这是迄今为止错过了毫米波长观测。
Interpreting the nature of starless cores has been a prominent goal in star formation for many years. In order to characterize the evolutionary stages of these objects, we perform synthetic observations of a numerical simulation of a turbulent molecular cloud. We find that nearly all cores that we detect are associated with filaments and eventually form protostars. We conclude that observed starless cores that appear Jeans unstable are only marginally larger than their respective Jeans masses (within a factor of three). We note single dish observations such as those performed with the James Clerk Maxwell Telescope appear to miss significant core structure on small scales because of beam averaging. Finally, we predict that interferometric observations with Atacama Large Millimeter Array Cycle 1 will resolve the important small-scale structure, which has so far been missed by millimeter wavelength observations.