发表机构
Institute for Nuclear Research of the Russian Academy of Sciences（俄罗斯科学院核物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究自由漂浮行星被困于原恒星氢云中，通过吸积增长成为替代动力学中心，触发引力坍缩形成恒星，并解释银河系中第二代恒星的可能形成机制。
AI 中文摘要
最近，在银河系中发现了一群自由漂浮的行星。本文研究了被困在原恒星氢云中的行星对气体引力不稳定性过程的影响。一颗质量足够大的行星可以成为收缩云团的替代动力学中心。这是由于云内行星吸积导致质量快速增长所致。由于云中残余的速度和密度梯度，触发恒星形成的行星最终可能位于新生恒星周围的遥远轨道上。银河系中一些第二代及后续世代的恒星可能是通过这种机制形成的。
英文摘要
Recently, a population of free-floating planets has been discovered in the Galaxy. This paper examines the influence of the planets trapped within a protostellar hydrogen clouds on the processes of gravitational instability in the gas. A sufficiently massive planet can become an alternative dynamic center for the contracting cloud. This occurs due to rapid mass growth from accretion onto the planet within the cloud. Owing to residual velocity and density gradients in the cloud, the planet that triggers star formation is likely to end up in a distant orbit around the newborn star. Some second- and subsequent-generation stars in the Galaxy may have formed via this mechanism.
Comments5 pages, 2 figures
