论文标题

相互作用的暗能量:新的参数化和观察性约束

Interacting Dark Energy: New parametrization and observational constraints

论文作者

Aich, Arkajit

论文摘要

我们对宇宙学进行了重新研究,涉及黑物质与暗能量之间的相互作用,鉴于新的参数化。新的参数化基于以下假设:当暗物质和暗能相互作用时,暗物质将以不同的方式稀释与标准的非相互作用情况。我们使用这种新的参数化重新构建了宇宙方程。还通过使用万神殿和哈勃数据的超新星数据获得了对传统宇宙学参数和新参数的观察约束。 The parameter values obtained are $H_0$ = 69.023 $\pm$ 0.722, $M$ = -19.385 $\pm$ 0.019, $I$ = 2.901 $\pm$ 0.092 and $Ω_{dm0}(1 - \frac{3}{I})\frac{1}κ$ = 0.254 $\pm$ 0.023其中$ h_0 $,$ m $,$ω_{dm0} $和$κ$是笨拙的,是恒定的,绝对的1a型超新星,当今的深色物质密度和深色物质之间的暗物质和深色能量之间的耦合参数,而$ i $ $ $ $ $ $是新的参数,在模型中介绍了模型中的模型,该模型介绍了一个模型,该模型构成了一个模型,该模型构成了这些模型,该模型构成了构图的构图。关于宇宙演变,减速参数,宇宙年龄,相互作用场景的粒子物理意义的物理特征,也已得到深入探讨,并得出了结论。

We have re-investigated Cosmology involving interaction between Dark matter and Dark Energy in the light of a new parametrization. The new parametrization is based on the hypothesis that when Dark matter and Dark Energy will interact, Dark matter will dilute in a different manner than standard non-interacting scenario. We re-built the Cosmological equations with this new parametrization. Observational constraints on the traditional Cosmological parameters and new parameters has also been obtained by using supernova data from Pantheon and Hubble data. The parameter values obtained are $H_0$ = 69.023 $\pm$ 0.722, $M$ = -19.385 $\pm$ 0.019, $I$ = 2.901 $\pm$ 0.092 and $Ω_{dm0}(1 - \frac{3}{I})\frac{1}κ$ = 0.254 $\pm$ 0.023 where $H_0$, $M$, $Ω_{dm0}$ and $κ$ are Hubble constant, absolute magnitude of type 1a supernova, present day dark matter density and coupling parameter between dark matter and dark energy respectively while $I$ is a new parameter, dubbed dilution parameter which we introduced in the model representing the modified dilution of dark matter in the interacting scenario. The physical features of the model in regard to evolution of the Universe, deceleration parameter, age of Universe, particle physics implications of interacting scenario has also been explored in depth and conclusions has been drawn.

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