Modelling planet-induced gaps and rings in ALMA discs: the role of in-plane radiative diffusion
Modelling planet-induced gaps and rings in ALMA discs: the role of in-plane radiative diffusion
复制标题
模拟 ALMA 圆盘中行星引起的间隙和环：面内辐射扩散的作用
DOI：
10.1093/mnras/stad1973
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发表时间：
2023
影响因子：
4.8
通讯作者：
Ziampras A
中科院分区：
文献类型：
--
作者：
Ziampras A
阿尔马观测尘埃连续发射中的原行星盘揭示了各种环形结构。将这些特征的存在归因于嵌入式行星是一种流行的假设，并得到了使用流体动力学模型的研究的支持。最近的研究表明，辐射冷却极大地影响了行星驱动的螺旋密度波传输角动量的能力，最终决定了行星可以在盘中雕刻的环和间隙的数量，位置和深度。然而，辐射传输仅通过局部热弛豫处理，不考虑辐射扩散沿着盘平面。我们比较了以前的国家的最先进的模型与本地冷却处方的行星盘相互作用，我们的新模型，包括在垂直方向上的冷却和辐射扩散的盘的平面，并表明，盘的响应诱导螺旋波可以显着不同时，比较这两种治疗的盘热力学。我们跟进与合成发射图的阿尔马系统，并表明，我们的新模型再现的观察发现，在文献中比局部冷却模型。我们的结论是，在使用行星盘相互作用情景解释阿尔马观测结果时，适当处理辐射传输是限制参数空间的关键。
ALMA observations of protoplanetary discs in dust continuum emission reveal a variety of annular structures. Attributing the existence of such features to embedded planets is a popular scenario, supported by studies using hydrodynamical models. Recent work has shown that radiative cooling greatly influences the capability of planet-driven spiral density waves to transport angular momentum, ultimately deciding the number, position, and depth of rings and gaps that a planet can carve in a disc. However, radiation transport has only been treated via local thermal relaxation, not taking into account radiative diffusion along the disc plane. We compare the previous state-of-the-art models of planet–disc interaction with local cooling prescriptions to our new models that include cooling in the vertical direction and radiative diffusion in the plane of the disc, and show that the response of the disc to the induced spiral waves can differ significantly when comparing these two treatments of the disc thermodynamics. We follow up with synthetic emission maps of ALMA systems, and show that our new models reproduce the observations found in the literature better than models with local cooling. We conclude that appropriate treatment of radiation transport is key to constraining the parameter space when interpreting ALMA observations using the planet–disc interaction scenario.