arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2208.03330astro-ph.COhep-phhep-th
收藏

脉冲星定时阵列探测到热大爆炸了吗？早期宇宙强一级相变中的引力波

Have Pulsar Timing Arrays detected the Hot Big Bang? Gravitational Waves from Strong First Order Phase Transitions in the Early Universe

Katherine Freese, Martin Wolfgang Winkler

备注：
41 pages, 11 figures
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

宇宙中物质和辐射的起源在于热大爆炸。我们提出了一些动机良好的宇宙学，其中大爆炸发生通过一个强大的一级相变-无论是在年底的通货膨胀，经过一段时间的kination（“Kination-Induced Big Bang”），或者在早期宇宙的第二个真空统治时期之后，（“过冷大爆炸”）;我们还提出了一个“黑暗大爆炸”，只有暗物质在宇宙中创造了一个一阶相变后膨胀。在所有这些情况下，如果热大爆炸的再加热温度以及相应的假真空的能量标度落在$T_* \sim ρ_{\rm vac}^{1/4} $ = MeV-100 GeV的范围内，那么由此产生的引力辐射就可以解释NANOGrav、Parkes和欧洲脉冲星定时阵列实验报告的试探性信号。在更高的再加热温度下的所有相同模型将对即将到来的基于地面和空间的干涉仪搜索更大频率的引力波感兴趣。

英文摘要：

The origins of matter and radiation in the universe lie in a Hot Big Bang. We present a number of well-motivated cosmologies in which the Big Bang occurs through a strong first order phase transition -- either at the end of inflation, after a period of kination ("Kination-Induced Big Bang"), or after a second period of vacuum-domination in the early universe ("Supercooled Big Bang"); we also propose a "Dark Big Bang" where only the dark matter in the Universe is created in a first-order phase transition much after inflation. In all of these scenarios, the resulting gravitational radiation can explain the tentative signals reported by the NANOGrav, Parkes and European Pulsar Timing Array experiments if the reheating temperature of the Hot Big Bang, and correspondingly the energy scale of the false vacuum, falls in the range $T_* \sim ρ_{\rm vac}^{1/4} $= MeV--100 GeV. All the same models at higher reheating temperatures will be of interest to upcoming ground- and space-based interferometer searches for gravitational waves at larger frequency.

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。

↑