Photoevaporation of protoplanetary gas discs due to flybys of external single stars in different orbits
Photoevaporation of protoplanetary gas discs due to flybys of external single stars in different orbits
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由于外部单星在不同轨道上的飞越而导致的原行星气盘的光蒸发
DOI：
10.1093/mnras/sty2142
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发表时间：
2018-08
影响因子：
4.8
通讯作者：
Zhou Ji-Lin
中科院分区：
文献类型：
--
作者：
Dai Yuan-Zhe;Liu Hui-Gen;Wu Wen-Bo;Xie Ji-Wei;Yang Ming;Zhang Hui;Zhou Ji-Lin
在原行星盘的演化过程中，中心恒星和外围恒星的光蒸发都起着重要的作用。由于星星形成的星系团中存在复杂的辐射环境，原行星盘由于飞掠事件而存在不同的寿命。本文主要研究金牛座T型星星与另一颗不同温度的主序星星星在不同近心距、偏心率和倾角的双曲轨道上相遇时的盘状结构。我们找到了飞越事件后中央星星的光蒸发导致间隙打开的判据。在气盘后期，气盘上出现了一个缺口，导致差距对行星的形成和迁移影响有限。如果飞越轨道具有一个中等的近心距，这对偏心率和倾角的依赖性很弱，外部光蒸发导致飞越事件期间的最大质量损失。在小偏心率或大倾角轨道上的飞掠星会引起较大的质量损失。采用一个简单的多个飞越模型，我们得出结论，在疏散星团，气体盘通常生存在典型的寿命在1和10万年之间，除了有许多大质量的恒星在密集的疏散星团。在球状星团中，盘状物分散得非常快，很难产生气体巨行星。快速耗尽的盘可能是球状星团中巨行星零检测的原因。
During the evolution of proto-planetary disc, photo-evaporations of both central and external stars play important roles. Considering the complicated radiation surroundings in the clusters, where the star formed, the proto-planetary discs survive in different lifetimes due to flyby events. In this paper, we mainly focus on the disc around a T Tauri star, which encounters with another main-sequence star with different temperatures in hyperbolic orbits with different peri-center distances, eccentricities and inclinations. We find the criterion for gap-opening due to photo-evaporation of central star after the flyby event. A gap is opened in the late stage of gas disc, and induce that the gap only influence the planet formation and migration limitedly. If the flyby orbit has a moderate value of peri-center distance, which weakly depends on the eccentricity and inclination, the external photo-evaporation lead to a maximum mass loss during the flyby event. Flyby stars in orbits with smaller eccentricities or larger inclinations induce larger mass loss. Adopting a simple multiple flyby models, we conclude that in open clusters, gas discs usually survive in typical lifetimes between 1 and 10 Myr, except there are many massive stars in dense open clusters. In globular clusters, discs disperse very quickly and hardly produce the gas giant planets. The fast-depleted discs are probably responsible for the null detection of giant planets in globular clusters.
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非常年轻的疏散星团中有界和自由漂浮的行星的结构
影响因子：
4.9
作者：
Liu, Hui-Gen;Zhang, Hui;Zhou, Ji-Lin
通讯作者：
Zhou, Ji-Lin
DOI：
10.1111/j.1365-2966.2006.10294.x
发表时间：
2006-03
期刊：
--
影响因子：
--
作者：
R.D.Alexander;C.J.Clarke;J.E.Pringle
通讯作者：
R.D.Alexander;C.J.Clarke;J.E.Pringle
DOI：
10.1111/j.1365-2966.2006.10293.x
发表时间：
2006-03
期刊：
--
影响因子：
--
作者：
R.D.Alexander;C.J.Clarke;J.E.Pringle
通讯作者：
R.D.Alexander;C.J.Clarke;J.E.Pringle
影响因子：
4.8
作者：
G. Rosotti;J. Dale;M. D. Ovelar;D. Hubber;J. Kruijssen;B. Ercolano;S. Walch
通讯作者：
G. Rosotti;J. Dale;M. D. Ovelar;D. Hubber;J. Kruijssen;B. Ercolano;S. Walch
影响因子：
6.5
作者：
V. Nascimbeni;V. Nascimbeni;L. Bedin;L. Bedin;G. Piotto;F. Marchi;R. Rich
通讯作者：
V. Nascimbeni;V. Nascimbeni;L. Bedin;L. Bedin;G. Piotto;F. Marchi;R. Rich