Resolved images of self-gravitating circumstellar discs with ALMA
Resolved images of self-gravitating circumstellar discs with ALMA
复制标题
使用 ALMA 解析自引力星周盘图像
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
H Germany
中科院分区：
文献类型：
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作者：
P. Cossins;G. Lodato;L. T. D. O. Physics;Astronomy;U. Leicester;UK Dipartimento di Fisica;U. Milano;I. E. G. Observatory;Garching;H Germany
在本文中，我们利用阿塔卡马大毫米/亚毫米阵列（ALMA）模拟观测了大质量自重力环星盘。利用一个0.2 m⊙的圆盘绕着1 m⊙的原恒星运行的光滑粒子流体动力学模型，以及一个适用于温度低于~ 160K和具有代表性的尘埃不透明的圆盘的冷却模型，我们已经构建了亚毫米波长的预期发射图。然后，我们使用通用天文软件应用ALMA模拟器，在考虑预期的热噪声和大气不透明度的情况下，生成不同阵列配置和观测频率的模拟图像和能见度。我们发现，在345 GHz （870 μm）分辨率为几个au的螺旋结构应该很容易在金牛座-御夫座恒星形成复星的距离上的近似面盘上检测到。
In this paper, we present simulated observations of massive self-gravitating circumstellar discs using the Atacama Large Millimetre/sub-millimetre Array (ALMA). Using a smoothed particle hydrodynamics model of a 0.2-M ⊙ disc orbiting a 1-M ⊙ protostar, with a cooling model appropriate for discs at temperatures below ∼160K and representative dust opacities, we have constructed maps of the expected emission at sub-mm wavelengths. We have then used the Common Astronomy Software Applications ALMA simulator to generate simulated images and visibilities with various array configurations and observation frequencies, taking into account the expected thermal noise and atmospheric opacities. We find that at 345 GHz (870 μm) spiral structures at a resolution of a few au should be readily detectable in approximately face-on discs out to distances of the Taurus-Auriga star-forming complex.