论文标题
坏死性：模拟分化行星材料WD WD 1145+017的潮汐破坏
Necroplanetology: Simulating the Tidal Disruption of Differentiated Planetary Material Orbiting WD 1145+017
论文作者
论文摘要
The WD 1145+017 system shows irregular transit features that are consistent with the tidal disruption of differentiated asteroids with bulk densities $< 4$ g cm$^{-3}$ and bulk masses $\lesssim 10^{21}$ kg (Veras et al., 2017; arXiv:1610.06926).我们使用开源n身体代码反弹（Rein and Liu，2011; Arxiv：1110.4876）通过不同的内部结构进行模拟这种破坏：改变核心体积分数，地幔/核心密度比以及存在/不存在/不存在薄密度壳。我们允许瓦砾桩在特定点处部分破坏并捕获与地面光度法相媲美的节奏的特定点。作为概念验证，我们表明，随着小行星的破坏，改变这些结构参数对过境光曲线具有可见的影响，并将模拟生成的灯泡与Gary等人的数据进行比较（Arxiv：Arxiv：Arxiv：1608.00026）。我们的模拟没有对其对轨道进化的影响进行详细升华或解释其对轨道进化的影响的警告，我们发现，低核心分数和低地幔/核心密度比小行星与2016年4月的稳定过境特征最一致（ARXIV：1702.05483）。将潮汐仿真与光度法联系起来，这是室内结构和外部机构组成的特征，这是可能的信息，因为我们正在观察到诸如Tess和LSST的新样本的extect seption smoptions temply smodips temply syment segress templ of tect and tess temply temply temply。行星科学：坏死学。
The WD 1145+017 system shows irregular transit features that are consistent with the tidal disruption of differentiated asteroids with bulk densities $< 4$ g cm$^{-3}$ and bulk masses $\lesssim 10^{21}$ kg (Veras et al., 2017; arXiv:1610.06926). We use the open-source N-body code REBOUND (Rein and Liu, 2011; arXiv:1110.4876) to simulate this disruption with different internal structures: varying the core volume fraction, mantle/core density ratio, and the presence/absence of a thin low-density crust. We allow the rubble pile to partially disrupt and capture lightcurves at a specific point during the disruption at cadences comparable to those from ground-based photometry. As a proof-of-concept we show that varying these structural parameters have observationally distinguishable effects on the transit light curve as the asteroid is disrupted and compare the simulation-generated lightcurves to data from Gary et al., 2017 (arXiv:1608.00026). With the caveat that our simulations do not model the sublimation in detail or account for its effects on orbital evolution, we find that a low core fraction and low mantle/core density ratio asteroid is most consistent with the stable transit feature present for multiple weeks circa April 2016 (referred to as G6121 in Gary et al., 2017 (arXiv:1608.00026) and A1 in Hallakoun et al., 2017 (arXiv:1702.05483). Connecting tidal disruption simulations to photometry suggests characteristics for the interior structure and composition of an exoplanetary body, information that is only possible because we are observing the death of the planetary system in action. All-sky survey missions such as TESS and LSST will be able to detect other systems like WD 1145+017, creating a sample of subjects for a new subfield of planetary science: necroplanetology.
