A low temperature transfer of ALH84001 from Mars to Earth.
A low temperature transfer of ALH84001 from Mars to Earth.
复制标题
ALH84001 从火星低温转移到地球。
DOI：
10.1126/science.290.5492.791
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发表时间：
2000
期刊：
影响因子：
56.9
通讯作者：
J. Wikswo
中科院分区：
文献类型：
--
作者：
Benjamin P. Weiss;J. Kirschvink;Franz J. Baudenbacher;H. Vali;N. Peters;Francis A. Macdonald;J. Wikswo
从火星喷出的物质被认为是由大规模的撞击引起的，这些撞击会将大部分喷出物加热到高温。火星陨石ALH84001的磁场图像揭示了与裂缝和岩石碎片相关的空间非均匀磁化模式。将陨石加热到40摄氏度会降低一些磁性特征的强度，这表明岩石的内部自其从火星表面喷出之前就没有超过这个温度。由于这个温度不能使大多数细菌或真核生物杀菌，这些数据支持陨石可以在太阳系行星之间转移生命的假设。
The ejection of material from Mars is thought to be caused by large impacts that would heat much of the ejecta to high temperatures. Images of the magnetic field of martian meteorite ALH84001 reveal a spatially heterogeneous pattern of magnetization associated with fractures and rock fragments. Heating the meteorite to 40 degrees C reduces the intensity of some magnetic features, indicating that the interior of the rock has not been above this temperature since before its ejection from the surface of Mars. Because this temperature cannot sterilize most bacteria or eukarya, these data support the hypothesis that meteorites could transfer life between planets in the solar system.