Variations on Debris Disks. IV. An Improved Analytical Model for Collisional Cascades
Variations on Debris Disks. IV. An Improved Analytical Model for Collisional Cascades
复制标题
碎片盘的变体。
DOI:
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
B. Bromley
中科院分区:
文献类型:
--
作者:
S. Kenyon;B. Bromley
We derive a new analytical model for the evolution of a collisional cascade in a thin annulus around a single central star. In this model, rmax the size of the largest object changes with time, , with 0.1–0.2. Compared to standard models where rmax is constant in time, this evolution results in a more rapid decline of Md, the total mass of solids in the annulus, and Ld, the luminosity of small particles in the annulus: and . We demonstrate that the analytical model provides an excellent match to a comprehensive suite of numerical coagulation simulations for annuli at 1 au and at 25 au. If the evolution of real debris disks follows the predictions of the analytical or numerical models, the observed luminosities for evolved stars require up to a factor of two more mass than predicted by previous analytical models.
影响因子:
3.2
作者:
Leinhardt Z
通讯作者:
Leinhardt Z
影响因子:
4.9
作者:
Leinhardt, Zoe M.;Stewart, Sarah T.
通讯作者:
Stewart, Sarah T.