Photoevaporative Dispersal of Protoplanetary Disks around Evolving Intermediate-mass Stars
Photoevaporative Dispersal of Protoplanetary Disks around Evolving Intermediate-mass Stars
复制标题
DOI：
10.3847/1538-4357/abdb2a
复制
发表时间：
2021-03
期刊：
影响因子：
--
通讯作者：
M. Kunitomo;S. Ida;T. Takeuchi;O. Panić;J. Miley;T. Suzuki
中科院分区：
文献类型：
--
作者：
M. Kunitomo;S. Ida;T. Takeuchi;O. Panić;J. Miley;T. Suzuki
我们的目标是了解恒星演化对原行星盘演化的影响。我们特别关注中等质量(IM)恒星周围的圆盘演化，这些恒星比低质量恒星演化得更快。考虑了恒星远紫外线、极紫外线和X射线辐射驱动的粘性吸积和光蒸发，数值求解了0.5M-5M☉恒星周围的盘状结构的长期演化。我们还考虑了恒星演化和PE率随时间的演化。我们发现IM星的FUV、EUV和X射线光度在几百万年内随着恒星结构、恒星有效温度或吸积率的时间演化而演化几个数量级。因此，PE率也随时间按数量级演化，我们得出结论：恒星演化对于IM星周围的盘状演化是至关重要的。
We aim to understand the effect of stellar evolution on the evolution of protoplanetary disks. We focus in particular on the disk evolution around intermediate-mass (IM) stars, which evolve more rapidly than low-mass ones. We numerically solve the long-term evolution of disks around 0.5–5 M ☉ stars considering viscous accretion and photoevaporation (PE) driven by stellar far-ultraviolet (FUV), extreme-ultraviolet (EUV), and X-ray emission. We also take stellar evolution into account and consider the time evolution of the PE rate. We find that the FUV, EUV, and X-ray luminosities of IM stars evolve by orders of magnitude within a few million years, along with the time evolution of stellar structure, stellar effective temperature, or accretion rate. Therefore, the PE rate also evolves with time by orders of magnitude, and we conclude that stellar evolution is crucial for the disk evolution around IM stars.