The FRIED grid of mass-loss rates for externally irradiated protoplanetary discs
The FRIED grid of mass-loss rates for externally irradiated protoplanetary discs
复制标题
DOI：
10.1093/mnras/sty2323
复制
发表时间：
2018-08
影响因子：
4.8
通讯作者：
T. Haworth;C. Clarke;Wahidur Rahman;A. Winter;S. Facchini
中科院分区：
文献类型：
--
作者：
T. Haworth;C. Clarke;Wahidur Rahman;A. Winter;S. Facchini
我们提出了一个开放访问网格，包含 3930 个外部蒸发原行星盘的计算。这涵盖了一系列圆盘尺寸 (1-400AU)、圆盘质量、紫外线场强度 (10-10$^4$G$_0$) 和恒星质量 (0.05-1.9M$_\odot$)。该网格可供公开下载，并提供了一种在盘演化计算中廉价地包含外部光蒸发的方法。还可以使用在线工具进行查询，以快速估计瞬时质量损失率（例如，方便评估实际观察到的系统）。 “FRIED”网格本身说明，对于恒星 $\leq0.3$M$_\odot$ 周围的圆盘，外部光蒸发对于小半径 ($<50$AU) 和至少弱至 10G$_0$ 的 UV 场是有效的。另一方面，在 $10^4$G$_0$ 环境中，即使对于质量至少高达 1.9M$_\odot$ 的恒星，光蒸发在低至 1AU 的情况下也是有效的。我们还说明了 CO 在光蒸发流出中的哪种状态下存在显着的质量损失率；标志着该系统成为通过亚开普勒旋转在弱中紫外环境中检测外部光蒸发的良好候选者。最后，我们根据 Guilloteau 等人的研究对金牛座椎间盘进行了说明性的质量损失率估计。 (2011) 星盘参数，发现大约一半预计会出现显着的质量损失并在光蒸发流出中保留二氧化碳。
We present an open access grid of 3930 calculations of externally evaporating protoplanetary discs. This spans a range of disc sizes (1-400AU), disc masses, UV field strengths (10-10$^4$G$_0$) and stellar masses (0.05-1.9M$_\odot$). The grid is publicly available for download, and offers a means of cheaply including external photoevaporation in disc evolutionary calculations. It can also be queried using an online tool for quick estimates of instantaneous mass loss rates (e.g for convenient evaluation of real observed systems). The `FRIED' grid itself illustrates that for discs around stars $\leq0.3$M$_\odot$ external photoevaporation is effective down to small radii ($<50$AU) down to UV fields at least as weak as 10G$_0$. At the other end of the scale, in a $10^4$G$_0$ environment photoevaporation is effective down to 1AU even for stellar masses at least as high as 1.9M$_\odot$. We also illustrate in which regimes CO survives in the photoevaporative outflow for significant mass loss rates; marking a system a good candidate to detect external photoevaporation in weak-intermediate UV environments through sub-Keplerian rotation. Finally we make illustrative mass loss rate estimates for discs in Taurus based on the Guilloteau et al. (2011) star-disc parameters, finding that around half are expected to have both significant mass loss and retain CO in the photoevaporative outflow.