重建化学元素的宇宙演化
Reconstructing the cosmic evolution of the chemical elements
摘要：
这些化学元素是在恒星炽热而致密的核心中的核聚变过程中产生的。通过核合成产生的能量使恒星能够发光数十亿年。当这些恒星爆炸成为大质量超新星时，新产生的元素被排出，使周围区域的化学物质丰富。随后的几代恒星是由气体形成的，这些气体的元素含量比以前的恒星略高。这种化学演化可以追溯到大爆炸后不久，通过研究今天在银河系中仍然可以观察到的最古老和最贫金属的恒星。通过化学分析，它们提供了唯一可用的工具，可以获得关于短寿命的第一颗恒星及其超过130亿年前超新星爆炸的信息。这些事件启动了原始宇宙转变为化学多样性行星，恒星和星系的丰富宇宙的过程。
英文摘要：
The chemical elements are created in nuclear fusion processes in the hot and dense cores of stars. The energy generated through nucleosynthesis allows stars to shine for billions of years. When these stars explode as massive supernovae, the newly made elements are expelled, chemically enriching the surrounding regions. Subsequent generations of stars are formed from gas that is slightly more element enriched than that from which previous stars formed. This chemical evolution can be traced back to its beginning soon after the Big Bang by studying the oldest and most metal-poor stars still observable in the Milky Way today. Through chemical analysis, they provide the only available tool for gaining information about the nature of the short-lived first stars and their supernova explosions more than thirteen billion years ago. These events set in motion the transformation of the pristine universe into a rich cosmos of chemically diverse planets, stars, and galaxies.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
