The Martian Atmosphere as a Meteoroid Detector
The Martian Atmosphere as a Meteoroid Detector
复制标题
火星大气层作为流星体探测器
DOI：
10.1006/icar.1996.0007
复制
发表时间：
1996
期刊：
影响因子：
3.2
通讯作者：
C. Murray
中科院分区：
文献类型：
--
作者：
L. G. Adolfsson;B. Gustafson;C. Murray
摘要研究了火星表面流星探测的可行性。我们估计，在火星轨道上高速摄影流星体的流量是地球上的50%。由于地球和火星的大气密度在120公里的高度相当，接近地球上发生流星消融的地方，我们也预计火星流星会在与地球相似的高度消融。通过数值积分，我们模拟了“小行星”粒子和“彗星”粒子进入大气层时的强度，粒子质量在10 −8到10 2 g之间。我们的结论是，高速流星体（约30公里/秒）在两个大气层中的星等相同;低速流星体在火星大气层中的星等较暗。我们建议，未来的火星任务应包括流星观测计划，这将允许直接测量流星体复杂的太阳系的另一个区域，以及提供重要的信息的结构和时间变化的火星大气。
Abstract We investigate the plausibility of detecting meteors from the surface of Mars. We estimate the flux of high-speed photographic meteoroids at the orbit of Mars to be ∼50% that at Earth. Because the atmospheric densities of the Earth and Mars are comparable at a height of 120 km, close to where meteor ablation occurs on Earth, we also expect martian meteors to ablate at heights similar to those on Earth. By numerical integration we have modeled the intensity of an “asteroidal” particle and a “cometary” particle as they enter the atmosphere, using particle masses in the range 10 −8 to 10 2 g. We conclude that high-speed (≳30 km sec −1 ) meteoroids will have the same magnitude in both atmospheres; lower speed meteoroids will be dimmer in Mars' atmosphere. We suggest that future missions to Mars should include meteor observation programs which would permit direct measurements of the meteoroid complex in another region of the solar system as well as providing important information on the structure and time variability of the martian atmosphere.