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arXiv 0912.3025astro-ph.SR
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双星系统中的行星形成:分离依赖机制?

Planet formation in binary systems: A separation-dependent mechanism?

G. Duchene

摘要:

在这篇文章中,我检查了几个观测趋势,原行星盘,碎片盘和系外行星在二元系统中,试图约束的物理机制,行星形成在这样的背景下。比100天文单位更宽的双星在各个方面都与单星难以区分。另一方面,在5-100 AU范围内的双星与寿命较短但(至少在某些情况下)质量相同的盘有关。此外,它们形成星子和成熟行星系统的速度与更宽的双星和单星相似,尽管它们主要产生大质量行星。我认为恒星伴星的位置影响核心吸积和磁盘碎片行星形成过程的相对重要性,后者的机制是占主导地位的双星紧密小于100 AU。

英文摘要:

In this article, I examine several observational trends regarding protoplanetary disks, debris disks and exoplanets in binary systems in an attempt to constrain the physical mechanisms of planet formation in such a context. Binaries wider than about 100 AU are indistinguishable from single stars in all aspects. Binaries in the 5-100 AU range, on the other hand, are associated with shorter-lived but (at least in some cases) equally massive disks. Furthermore, they form planetesimals and mature planetary systems at a similar rate as wider binaries and single stars, albeit with the peculiarity that they predominantly produce high-mass planets. I posit that the location of a stellar companion influences the relative importance of the core accretion and disk fragmentation planet formation processes, with the latter mechanism being predominant in binaries tighter than 100 AU.

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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