The generalized cosmic equation of state: a revised study with cosmological standard rulers

Abstract

CDM cosmology is present in the combined standard ruler data.

Complete cosmological model based on a asymmetric scalar Higgs doublet

“…Substituting into (15) the expression for (−3 ȧ2 /a 2 ) from the Einstein equation (12) for ȧ ≡ 0, we get the Einstein equation (13). Thus, the Einstein equation for the spatial components α α (13) for ȧ ≡ 0 is a differential -algebraic consequence of the field equation ( 10) and Einstein's equations for the 4 4 component.…”

“…Strict limits can be obtained in combination with other observational data, including measurements of the Hubble parameter H(z) at different redshifts. When combining standard rulers and standard clocks, the best match is observed when w0 = −1.01(+0.56 − 0.31) [15]. For the flat wCDM model, the constant parameter of the dark energy equation of state w = −1.013(+0.068 − 0.073) [16] was measured, see also [17,18].…”

Constraint on the interacting dark energy from the highly redshifted quasar data

“…类星体具有很高的宇宙学 红移值, 这相比于传统的独立宇宙学探针而言在 时间维度上有了很高的提升, 这对于研究宇宙的 整 体 演 化 具 有 非 常 重 要 的 作 用. 随 后 的 研 究 表 明 这 种 方 法 是 普 适 且 有 效 的: 精 确 检 验 暗 能 量 动力学 [38,39] , 检验暗能量与暗物质之间的相互作 用 [40] , 对修改引力模型的约束 [41,42] . 结合Gaussian processes处理的OHD数据可以对宇宙曲率Ω K 进 行 直接测量, 从而直接验证了宇宙在演化早期的平坦 性 [43] .…”

“…本文采用Cao等人 [44] 从甚长基线巡天(VLBI)射 电源类星体数据中提取的红移范围在0.46 < z < 2.76、 120组中等亮度的类星体角尺度-红移数据样 本 [31,[34][35][36][37][38][39][40][41][42][43][44][45] 作为标准直尺限制相互作用模型. 该组数 据的谱指数范围为−0.38 ≤ α ≤ 0.18, 观测亮度范围 在10 27 W/Hz≤ L ≤ 10 28 W/Hz.…”

Entropy of the electrically charged hairy black holes

“…Recently, there has also been flourishing interest in the subject of dark energy (DE) [9][10][11][12][13][14][15], which has opened up an interesting possibility to deeply understand the quasi-de Sita e-mail: caoshuo@bnu.edu.cn ter spacetime in the early inflation period [16][17][18][19]. On the other hand, the inclusion of cosmological constant (or vacuum energy density) in the study of de Sitter spacetime is very similar to the case of dark energy in modern cosmology.…”