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arXiv 2602.17441astro-ph.EP
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向木星系统输送复杂有机分子

Delivery of complex organic molecules to the system of Jupiter

Aix-Marseille Université(艾克斯-马赛大学);Southwest Research Institute(西南研究所)

T. Benest Couzinou, A. Amsler Moulanier, O. Mousis

AI总结:

研究通过模拟原太阳星云中复杂有机分子的形成及输送,探讨其对木星系统内木卫系组成的影响。

摘要:

复杂有机分子是分子多样性的重要标志,其在原行星盘中的形成条件仍然是研究的活跃领域。这些分子已在多种天体上被检测到,包括冰月,可能在塑造当前木卫系的组成中发挥关键作用。实验研究表明,它们的形成可能源于NH3:CO2冰的紫外照射或热处理。在此背景下,我们研究了原太阳星云中复杂有机分子的形成及其向木星系统区域的输送。使用二维盘演化模型,对500个独立粒子进行了拉格朗日输送和照射模拟。基于紫外照射和CO2:NH3冰热处理的实验,该模型使我们能够估算通过这些过程形成复杂有机分子的潜力。在局部温度为20 K(对应约12 AU)时,几乎没有任何粒子能到达木星系统区域。然而,当在局部温度为80 K(约7 AU)时,约45%的厘米级粒子和30%的微米级粒子可通过热处理形成复杂有机分子,随后在30万年内到达木星系统区域。假设木卫系是在围绕木星的冷环状行星盘中形成的,其内部可能存在的含氮物种可能起源于原太阳星云中复杂有机分子的形成。

英文摘要:

Complex organic molecules are key markers of molecular diversity, and their formation conditions in protoplanetary disks remain an active area of research. These molecules have been detected on a variety of celestial bodies, including icy moons, and may play a crucial role in shaping the current composition of the Galilean moons. Experimental studies suggest that their formation could result from UV irradiation or thermal processing of NH3:CO2 ices. In this context, we investigate the formation of complex organic molecules in the protosolar nebula and their subsequent transport to the Jupiter system region. Lagrangian transport and irradiation simulations of 500 individual particles are performed using a two-dimensional disk evolution model. Based on experiments with UV irradiation and thermal processing of CO2:NH3 ice, this model allows us to estimate the estimate the potential for the formation of complex organic molecules through these processes. Almost none of the particles released at a local temperature of 20 K (corresponding to ~12 AU from the Sun) reach the location of the system of Jupiter. However, when released at a local temperature of 80 K (~7 AU), approximately 45% of the centimetric particles and 30% of the micrometric particles can form complex organic molecules via thermal processing, subsequently reaching the location of the system of Jupiter within 300 kyr. Assuming that the Galilean moons formed in a cold circumplanetary disk around Jupiter, the nitrogen-bearing species potentially present in their interiors could have originated from the formation of complex organic molecules in the protosolar nebula.

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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