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首页> 外文期刊>The Astrophysical journal >VERY COLD AND MASSIVE CORES NEAR ISOSS J18364-0221: IMPLICATIONS FOR THE INITIAL CONDITIONS OF HIGH-MASS STAR FORMATION
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VERY COLD AND MASSIVE CORES NEAR ISOSS J18364-0221: IMPLICATIONS FOR THE INITIAL CONDITIONS OF HIGH-MASS STAR FORMATION

机译：ISOSS J18364-0221附近的非常冷和大量的核：对高质量恒星形成初始条件的暗示

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摘要

We report the discovery of two very cold and massive molecular cloud cores in the region ISOSS J18364-0221. The object has been identified by a systematic search for very early evolutionary stages of high-mass stars using the 170 μm ISOPHOT Serendipity Survey (ISOSS). Submillimeter continuum and molecular line measurements reveal two compact cores within this region. The first core has a temperature of 16.5 K, shows signs of ongoing infall and outflows, has no near- or mid-infrared counterpart, and is massive enough (M ～ 75 solar mass) to form at least one O star with an associated cluster. It is therefore considered a candidate for a genuine high-mass protostar and a high-mass analog to the Class 0 objects. The second core has an average gas and dust temperature of only ～12 K and a mass of M ～ 280 solar mass. Its temperature and level of turbulence are below the values found for massive cores so far, and we suggest that this represents the initial conditions from which high-mass star formation occurs.
机译：我们报告了在ISOSS J18364-0221地区发现了两个非常冷而庞大的分子云核心的发现。该物体已通过使用170μmISOPHOT意外调查（ISOSS）对高质量恒星非常早期的演化阶段进行系统搜索来识别。亚毫米连续谱和分子线测量揭示了该区域内的两个致密核。第一核的温度为16.5 K，显示出持续进出的迹象，没有近红外或中红外对应物，并且质量足够大（M〜75太阳质量），可以形成至少一个带有相关星团的O星。因此，它被认为是真正的高品质原恒星和0类物体的高品质模拟物的候选者。第二个核的平均气体和尘埃温度仅为〜12 K，质量为M〜280太阳质量。到目前为止，它的温度和湍流水平都低于大质量核的发现值，我们建议这代表了形成高质量恒星的初始条件。

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