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arXiv 1002.3278astro-ph.CO
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宇宙暴胀与再加热之间早期结构形成过程中引力波的产生

Generation of gravitational waves during early structure formation between cosmic inflation and reheating

Karsten Jedamzik, Martin Lemoine, Jerome Martin

摘要:

在预加热时期,在宇宙暴胀和辐射支配之前,能量密度可能由振荡的大质量标量凝聚体支配,例如二次混沌暴胀的情况。我们在以前的一篇论文中发现,在此期间,大范围的亚哈勃尺度扰动受到预热不稳定性的影响,导致密度扰动的增长,最终坍缩形成非线性结构。我们在这里计算的引力波信号,由于这些结构中的线性限制和目前的估计排放的非线性限制,由于各种影响:崩溃的晕,潮汐相互作用,蒸发过程中的暴胀冷凝物转化为辐射,最后随之而来的湍流级联。引力波信号可能相当大,并且可能被未来的探测器测试。

英文摘要:

In the pre-reheating era, following cosmic inflation and preceding radiation domination, the energy density may be dominated by an oscillating massive scalar condensate, such as is the case for quadratic chaotic inflation. We have found in a previous paper that during this period, a wide range of sub-Hubble scale perturbations are subject to a preheating instability, leading to the growth of density perturbations ultimately collapsing to form non-linear structures. We compute here the gravitational wave signal due to these structures in the linear limit and present estimates for emission in the non-linear limit due to various effects: the collapse of halos, the tidal interactions, the evaporation during the conversion of the inflaton condensate into radiation and finally the ensuing turbulent cascades. The gravitational wave signal could be rather large and potentially testable by future detectors.

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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