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arXiv 2409.02537astro-ph.GAastro-ph.EPastro-ph.SR
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银河系尺度上的天体化学

Astrochemistry on Galactic scales

L. Colzi, V. M. Rivilla, M. T. Beltrán, C. Y. Law, E. Redaelli, M. Padovani

AI总结:

本文综述了银河系尺度天体化学研究,重点介绍利用高灵敏度宽带宽谱线巡天揭示分子云和恒星形成区中的化学复杂性及生命起源前分子,并通过同位素比值和宇宙射线作用探讨银河系化学演化。

摘要:

针对银河系中不同环境日益增多的观测,以及理论和实验工作,正在提升我们对星际介质(ISM)中天体化学过程的认识。在本章中,我们报告了一些研究整个银河系化学复杂性和同位素比值的主要项目。覆盖宽带宽的高灵敏度谱线巡天,针对银河系中心分子云(例如 G+0.693-0.027)和恒星形成区(例如热核 G31.41+0.31),正在揭示非常丰富的天体化学储库,其中包括具有生命起源前意义的分子。同时,同位素比值(例如 $^{12}$C/$^{13}$C 和 $^{14}$N/$^{15}$N)可以提供关于银河系化学演化的重要信息,以及由于分子云物理条件所导致的局部化学过程的信息。我们还强调了宇宙射线作为影响上述星际化学的关键因素的作用。

英文摘要:

The increasing number of observations towards different environments in the Milky Way, as well as theoretical and experimental works, are improving our knowledge of the astrochemical processes in the interstellar medium (ISM). In this chapter we report some of the main projects to study the chemical complexity and isotopic ratios across the Galaxy. High-sensitivity spectral surveys covering broad bandwidths towards Galactic Center molecular clouds (e.g. G+0.693-0.027) and star-forming regions (e.g. the hot core G31.41+0.31) are revealing very rich astrochemical reservoirs, which include molecules of prebiotic interest. At the same time, isotopic ratios (e.g. $^{12}$C/$^{13}$C and $^{14}$N/$^{15}$N) can give important information on the Galactic chemical evolution, as well as on chemical local processes due to the physical conditions of the molecular clouds. We also highlight the role of cosmic rays as a key agent affecting the interstellar chemistry described above.

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。

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