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arXiv 1301.3015astro-ph.SRastro-ph.EP
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X射线光蒸发与行星形成之间的相互作用

The interplay between X-ray photoevaporation and planet formation

Giovanni P. Rosotti, Barbara Ercolano, James E. Owen, Philip J. Armitage

备注：
11 pages, 10 figures, accepted by MNRAS on 31/12/2012
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摘要：

我们评估的潜力行星形成煽动早期形成的光蒸发驱动的差距，半径大于典型的光蒸发。在我们的研究中，我们使用了一个巨大的行星嵌入光蒸发盘的流体动力学模型。我们发现，通过减少质量吸积流到恒星，光盘，形成巨行星将被分散在较早的时间比光盘没有行星的X射线光蒸发。通过清除行星轨道半径内的盘的部分，行星形成诱导的光蒸发（PIPE）能够产生过渡盘，当与标准X射线光蒸发相比时，对于给定的质量吸积率，过渡盘具有更大的孔。这构成了一个可能的路线，形成了观察到的一类吸积过渡盘与大孔，这是难以解释的行星形成或光蒸发单独。此外，假设一颗行星能够完全过滤灰尘，PIPE会产生一个带有大洞的过渡盘，并可能提供一种快速关闭吸积的机制。然而，这个过程似乎太慢，无法解释在具有大空洞和低质量吸积率的过渡盘人口中观察到的沙漠。

英文摘要：

We assess the potential of planet formation instigating the early formation of a photoevaporation driven gap, up to radii larger than typical for photoevaporation alone. For our investigation we make use of hydrodynamics models of photoevaporating discs with a giant planet embedded. We find that, by reducing the mass accretion flow onto the star, discs that form giant planets will be dispersed at earlier times than discs without planets by X-ray photoevaporation. By clearing the portion of the disc inner of the planet orbital radius, planet formation induced photoevaporation (PIPE) is able to produce transition disc that for a given mass accretion rate have larger holes when compared to standard X-ray photoevaporation. This constitutes a possible route for the formation of the observed class of accreting transition discs with large holes, which are otherwise difficult to explain by planet formation or photoevaporation alone. Moreover, assuming that a planet is able to filter dust completely, PIPE produces a transition disc with a large hole and may provide a mechanism to quickly shut down accretion. This process appears to be too slow however to explain the observed desert in the population of transition disc with large holes and low mass accretion rates.

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