arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.5519astro-ph.CO
收藏

原始行星形成

Primordial Planet Formation

Rudolph E. Schild, Carl H. Gibson

摘要:

最近探索太阳系性质的航天器观测影响了恒星、行星和彗星形成的标准范式。我们强调的是,由深度撞击任务产生的意外的微观尘埃云,以及STARDUST样品中熔融结核的存在。而恒星形成理论并不能解释标准气体碎裂情景中双星和多星系统的普遍存在。目前没有任何行星形成的理论可以解释地球的铁核,在海洋的水。这些困难在行星质量物体最初形成的情况下是避免的,今天是重子暗物质。它们已经在类星体微透镜和异常类星体射电增亮爆发中被探测到。原始行星通常聚集在一起形成恒星,在最年轻的恒星周围的星前吸积盘中可以看到残余物质。这些原始的行星质量体是由氢氦组成的,在大爆炸后38万年等离子体中和时聚集成一万亿的致密团块。大多数已经被冻结和不可见,但现在正以多种方式表现出来,因为敏感的现代太空望远镜开始运作。它们的关键探测特征是它们的热发射光谱,定位在13.8开氏度的氢三相点,重子暗物质(Staplefeldt et al. 1999)。

英文摘要:

Recent spacecraft observations exploring solar system properties impact standard paradigms of the formation of stars, planets and comets. We stress the unexpected cloud of microscopic dust resulting from the DEEP IMPACT mission, and the existence of molten nodules in STARDUST samples. And the theory of star formation does not explain the common occurrence of binary and multiple star systems in the standard gas fragmentation scenario. No current theory of planet formation can explain the iron core of the earth, under oceans of water. These difficulties are avoided in a scenario where the planet mass objects form primordially and are today the baryonic dark matter. They have been detected in quasar microlensing and anomalous quasar radio brightening bursts. The primordial planets often concentrate together to form a star, with residual matter seen in pre-stellar accretion discs around the youngest stars. These primordial planet mass bodies were formed of hydrogen-helium, aggregated in dense clumps of a trillion at the time of plasma neutralization 380,000 years after the big bang. Most have been frozen and invisible, but are now manifesting themselves in numerous ways as sensitive modern space telescopes become operational. Their key detection signature is their thermal emission spectrum, pegged at the 13.8 degrees Kelvin triple point of hydrogen, the baryonic dark matter (Staplefeldt et al. 1999).

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。

↑