超引力作用下的奇异速度异常?
Peculiar Velocity Anomaly from Forces Beyond Gravity?
摘要:
我们解决最近报道的100百万pc/h及以上的规模上的巨大的批量流量。这些星系的相干运动挑战了标准的LCDM一致性模型,以及一大类竞争性的暗能量和修正引力模型。如果得到证实,他们可能支持替代模型,包括额外的耦合诱导增强的特殊速度在大尺度上。大规模扰动的演变的一个补充探针是集成的萨克斯-沃尔夫效应,我们探索这个可观察到的和散装流量之间的连接。为了说明,我们考虑了暗能量和暗物质之间的耦合以及一个特定的宇宙学模型,增长中微子的精髓。
英文摘要:
We address recently reported anomalously large bulk flows on scales of 100 Mpc/h and beyond. These coherent motions of galaxies challenge the standard LCDM concordance model as well as a large class of competitive models of dark energy and modified gravity. If confirmed, they may support alternative models that include extra couplings inducing enhanced peculiar velocities on large scales. A complementary probe of the evolution of large-scale perturbations is the integrated Sachs-Wolfe effect; we explore the connection between this observable and the bulk flow. For illustration, we consider a coupling between dark energy and dark matter as well as a specific cosmological model, growing neutrino quintessence.
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