arXiv 1002.46932010-02astro-ph.SR

超大质量恒星原行星盘的结果

The Outcome of the Protoplanetary Disk of Very Massive Stars

Amit Kashi, Noam Soker

备注：: Accepted to New Astronomy
DOI：: 10.1016/j.newast.2010.06.003

摘要：

我们认为行星、褐矮星甚至低质量恒星都可以由M>~100太阳质量的超大质量恒星周围的原行星盘碎裂而形成。我们讨论了如何碎裂条件下形成非常大质量的行星系统周围非常大质量的恒星有利。这样的行星系统很可能由棕矮星和低质量恒星组成，质量约为0.1-0.3太阳质量，轨道间距约为几个x 100 - 10^4天文单位。特别是，从类太阳恒星的尺度表明，数百颗类水星行星可能围绕着大约1000 AU的超大质量恒星运行，那里的条件可能有利于液态水。这种碎裂物体可以成为詹姆斯·韦伯空间望远镜和其他在红外波段工作的大型望远镜的理想目标。我们预测，对超大质量恒星的深入观测将揭示这些碎片物体，在有一个以上物体的情况下，它们在同一轨道平面上运行。

英文摘要：

We suggest that planets, brown dwarfs, and even low mass stars can be formed by fragmentation of protoplanetary disks around very massive stars M>~100 solar masses. We discuss how fragmentation conditions make the formation of very massive planetary systems around very massive stars favorable. Such planetary systems are likely to be composed of brown dwarfs and low mass stars of ~0.1-0.3 solar masses, at orbital separations of ~ few x 100 - 10^4 AU. In particular, scaling from solar-like stars suggests that hundreds of Mercury-like planets might orbit very massive stars at ~1000 AU, where conditions might favor liquid water. Such fragmentation objects can be excellent targets for the James Webb Space Telescope and other large telescopes working in the IR bands. We predict that deep observations of very massive stars would reveal these fragmentation objects, orbiting in the same orbital plane in cases where there are more than one object.

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