论文标题
我们喝了好45亿水的水
We Drink Good 4.5-Billion-Year-Old Water
论文作者
论文摘要
水对于地球上生命的出现和演变至关重要。对早期形成的行星系统中水含量的最新研究类似于我们自己的自身，表明水是一种丰富而普遍存在的分子，最初通过冷冻氧的氢化在微小的星际粉尘晶粒的表面上合成。然后，水进入行星系统形成的连续阶段的升华/冷冻周期，即热的科里诺斯和原球盘，最终将其掺入行星，小行星和彗星中。在地球上测量的重水和早期形成的行星系统的数量表明，从太阳系组的第一阶段继承了大量陆地水，已有45亿年的历史。
Water is crucial for the emergence and evolution of life on Earth. Recent studies of the water content in early forming planetary systems similar to our own show that water is an abundant and ubiquitous molecule, initially synthesized on the surfaces of tiny interstellar dust grains by the hydrogenation of frozen oxygen. Water then enters a cycle of sublimation/freezing throughout the successive phases of planetary system formation, namely, hot corinos and protoplanetary disks, eventually to be incorporated into planets, asteroids, and comets. The amount of heavy water measured on Earth and in early forming planetary systems suggests that a substantial fraction of terrestrial water was inherited from the very first phases of the Solar System formation and is 4.5 billion years old.
