我们的天体化学遗产
Our astrochemical heritage
摘要:
我们的太阳和行星系统诞生于大约45亿年前。这是如何发生的,我们从这些早期的遗产是什么?本文试图从天体化学的角度来解决这些问题。一方面,我们从陨石、彗星和太阳系的其他小天体中获得了一些重要信息。另一方面,我们有关于银河系中类太阳恒星形成过程的研究结果。这些结果告诉我们,类太阳恒星形成于分子云的密集区域,在行星形成之前有三个主要步骤。它们由星前核、原恒星包层和原行星盘相代表。随着从一个相到另一个相的演变,化学组成变得越来越复杂。在这篇评论中,我们首先介绍了陨石,彗星和太阳系其他小天体的化学成分,这可能与太阳系形成的第一阶段有关。然后,我们描述了所观察到的化学成分的前星核,原恒星的信封和原行星盘阶段,包括过程,导致他们。最后,我们从不同的物体和阶段中提取碎片,以了解我们是否从太阳诞生的时候继承了化学物质,以及继承了多少。
英文摘要:
Our Sun and planetary system were born about 4.5 billion years ago. How did this happen and what is our heritage from these early times? This review tries to address these questions from an astrochemical point of view. On the one hand, we have some crucial information from meteorites, comets and other small bodies of the Solar System. On the other hand, we have the results of studies on the formation process of Sun-like stars in our Galaxy. These results tell us that Sun-like stars form in dense regions of molecular clouds and that three major steps are involved before the planet formation period. They are represented by the pre-stellar core, protostellar envelope and protoplanetary disk phases. Simultaneously with the evolution from one phase to the other, the chemical composition gains increasing complexity. In this review, we first present the information on the chemical composition of meteorites, comets and other small bodies of the Solar System, which is potentially linked to the first phases of the Solar System's formation. Then we describe the observed chemical composition in the pre-stellar core, protostellar envelope and protoplanetary disk phases, including the processes that lead to them. Finally, we draw together pieces from the different objects and phases to understand whether and how much we inherited chemically from the time of the Sun's birth.
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