论文标题

与红移空间扭曲相互作用的质量探测

Qualitative probe of interacting dark energy with redshift-space distortions

论文作者

Duniya, Didam

论文摘要

需要正确识别相互作用的暗能量(IDE)的烙印,以避免在IDE上的限制中偏见。本文使用$ euclid $类似的光度法规定,研究了红移空间扭曲中IDE的大规模烙印。首次尝试将IDE动力学纳入银河系(聚类和进化)偏见。如果没有像常规上完成的星系偏差中考虑的IDE动力学,结果表明,对于状态参数的恒定暗能量方程,这是一个IDE模型,其中暗能传递速率与深色能量密度成比例的,在红色Shift空间畸形角度角度范围内表现出交替的,积极的效果。但是,当将IDE动力学纳入银河系偏见时,发现明显的正阴性交替效应消失了:暗示忽略星系偏见中的IDE动力学可能会导致“伪像”,从而导致不正确的IDE印刷识别。通常,结果表明,将需要进行多个示踪分析来击败宇宙差异,以使红移空间扭曲角度扭曲作为统计数据,以作为IDE的可行诊断。此外,发现Redshift空间扭曲具有限制大尺度上的IDE的潜力,在RedShifts $ z \,{\ leq} \,1 $;随着场景在偏见中纳入了IDE动力学,显示出更好的潜力。

The imprint of interacting dark energy (IDE) needs to be correctly identified in order to avoid bias in constraints on IDE. This paper investigates the large-scale imprint of IDE in redshift space distortions, using $Euclid$-like photometric prescriptions. A first attempt at incorporating the IDE dynamics in the galaxy (clustering and evolution) biases is made. Without IDE dynamics taken into account in the galaxy biases, as is conventionally done, the results suggest that for a constant dark energy equation of state parameter, an IDE model where the dark energy transfer rate is proportional to the dark energy density exhibits an alternating, positive-negative effect in the redshift space distortions angular power spectrum. However, when the IDE dynamics is incorporated in the galaxy biases, it is found that the apparent positive-negative alternating effect vanishes: implying that neglecting IDE dynamics in the galaxy biases can result in ''artefacts'' that can lead to incorrect identification of the IDE imprint. In general, the results show that multi-tracer analysis will be needed to beat down cosmic variance in order for the redshift space distortions angular power spectrum as a statistic to be a viable diagnostic of IDE. Moreover, it is found that redshift space distortions hold the potential to constrain IDE on large scales, at redshifts $z \,{\leq}\, 1$; with the scenario having IDE dynamics incorporated in the biases showing better potential.

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