Long-lived planetesimal discs
Long-lived planetesimal discs
复制标题
长寿的星子盘
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
S. Tremaine
中科院分区：
文献类型：
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作者：
K. Heng;S. Tremaine
我们调查的生存在陀螺仪的时间尺度的星子光盘，使用统一的方法，适用于所有开普勒光盘的固体机构-尘埃颗粒，小行星，行星等星子光盘可以本地的特点是由四个参数：表面密度，半长轴，星子大小和星子径向速度色散。任何行星盘都必须经历过所有的动力学过程，包括引力不稳定性、动力学混沌、引力散射、物理碰撞和辐射力，这将导致其生命周期中的重大演化。这些过程导致了一组丰富的约束条件，强烈限制了长寿光盘的可能属性。在这个框架内，我们还讨论了检测的星子光盘使用径向速度测量，过境，微透镜和红外线发射的星子本身或星子碰撞产生的尘埃。
We investigate the survival of planetesimal discs over Gyr time-scales, using a unified approach that is applicable to all Keplerian discs of solid bodies – dust grains, asteroids, planets, etc. Planetesimal discs can be characterized locally by four parameters: surface density, semimajor axis, planetesimal size and planetesimal radial velocity dispersion. Any planetesimal disc must have survived all dynamical processes, including gravitational instability, dynamical chaos, gravitational scattering, physical collisions, and radiation forces, that would lead to significant evolution over its lifetime. These processes lead to a rich set of constraints that strongly restrict the possible properties of long-lived discs. Within this framework, we also discuss the detection of planetesimal discs using radial velocity measurements, transits, microlensing and the infrared emission from the planetesimals themselves or from dust generated by planetesimal collisions.
DOI：
10.1088/0004-637x/691/2/l133
发表时间：
2009-02
期刊：
The Astrophysical Journal
影响因子：
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作者：
S. Stewart;Z. Leinhardt
通讯作者：
S. Stewart;Z. Leinhardt