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arXiv 2105.02168astro-ph.COgr-qc
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用大尺度结构探测暗物质密度演化规律

Probing the dark matter density evolution law with large scale structures

Kamal Bora, R. F. L. Holanda, Shantanu Desai

摘要:

我们提出了一种新的方法来探索一个可能的偏离标准的时间演化规律的暗物质密度。我们通过使用由$ρ_c(z) \propto (1+z)^{3+ε}$给出的变形演化定律来寻找违反该定律的情况,然后约束$ε$。用于此目的的数据集包括从SLOAN Lens ACS、BOSS发射线透镜巡天、Strong Legacy Survey SL 2S和SLACS获得的强引力透镜数据;以及使用钱德拉望远镜获得的星系团X射线气体质量分数测量值。我们的分析表明,在1个$σ$ c.l.内,$ε$与零一致,但目前的数据集不能以高置信度排除暗物质和暗能量的相互作用模型。

英文摘要:

We propose a new method to explore a possible departure from the standard time evolution law for the dark matter density. We looked for a violation of this law by using a deformed evolution law, given by $ρ_c(z) \propto (1+z)^{3+ε}$, and then constrain $ε$. The dataset used for this purpose consists of Strong Gravitational Lensing data obtained from SLOAN Lens ACS, BOSS Emission-line Lens Survey, Strong Legacy Survey SL2S, and SLACS; along with galaxy cluster X-ray gas mass fraction measurements obtained using the Chandra Telescope. Our analyses show that $ε$ is consistent with zero within 1 $σ$ c.l., but the current dataset cannot rule out with high confidence level interacting models of dark matter and dark energy.

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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