建立小行星撞击墨西哥领土的模型

Raul Gutierrez-Zalapa, Mario Rodríguez-Martínez, Ernesto Aguilar-Rodríguez, Joaquin Estevez-Delgado
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引用次数: 0

摘要

这项工作的重点是了解发生在墨西哥境内的小行星撞击对物理、环境和人口的影响。这项工作包括改编以前文献中的常规产品,生成一个用 PyThon 编写的数字代码,以便对这种现象进行建模。首先,绘制了墨西哥领土表层密度地图,分辨率为地球经度 0.5^\circ$ 乘以纬度 0.5^\circ$ 。通过该地图,我们可以找到墨西哥特定地质区域的地表密度值。一旦获得地表密度值,就可以将其确定为撞击地点(目标)的值。该模型需要使用固定参数,如物体直径、密度或质量、入射角和撞击点的密度值。输出结果提供了撞击速度、释放的能量、陨石坑的直径和深度、地震的震级以及表面的破坏情况。我们在两种假设情况下研究了奇克苏卢布小行星事件。首先,修改了大气密度曲线,从而可以计算出新的撞击速度值。其次,我们假设小行星以初始质量的一部分撞击地球,并据此重新计算了三个不同目标的撞击速度及其影响。它们被用来计算如果撞击发生在今天,会对基础设施造成的破坏。最后,我们将模型得出的结果与文献进行了比较,结果表明它们与观测数据是一致的。像这样的模型有助于为预防这类事件提供工具,而在研究空间风险的背景下,预防这类事件在墨西哥是必要的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modeling the impact of asteroids over Mexican territory
This work focuses on knowing the physical, environmental and population effects from the impact of an asteroid occurring in the Mexican territory. The work consists of the adaptation of routines product of previous works in the literature to generate a numerical code written in PyThon that allowed modeling this kind of phenomenon. Firstly, a map of the superficial densities of the Mexican territory has been developed with a resolution of $0.5^\circ$ of longitude by $0.5^\circ$ of latitude of the Earth. The map allows us to find the value of surface density in a specific geological area of the country. Once the surface density value was obtained, it is established as the value of the impact site (target). The model requires using fixed parameters, such as the diameter of the body, its density or mass, the angle of incidence and the density value at the impact site. The output, provides the impact velocity, as well as the energy released, diameter and depth of the crater, the magnitude of the earthquake as well as the damage on the surface. We studied the Chicxulub asteroid event in two hypothetical scenarios. Firstly, the atmospheric density profile was modified, allowing the calculation of a new value for the impact velocity. Secondly, we assume that the object hits with a fraction of the initial mass, and with this the impact velocity and its effects were recalculated for three different targets. They were used to calculate the infrastructure damage they would cause if the impact could occur today. Finally, the results obtained by our model were compared with the literature, showing that they are consistent with the observational data. Models such as this one contribute to having tools for the attention towards the prevention of this kind of event that in the context of the study risks from the space are necessary in Mexico.
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