Cosmological constraints on late-Universe decaying dark matter as a solution to the H0 tension
Cosmological constraints on late-Universe decaying dark matter as a solution to the H0 tension
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DOI：
10.1103/physrevd.103.043014
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发表时间：
2020-06
影响因子：
5
通讯作者：
Steven J. Clark;Kyriakos Vattis;S. Koushiappas
中科院分区：
文献类型：
--
作者：
Steven J. Clark;Kyriakos Vattis;S. Koushiappas
有人提出，宇宙晚期暗物质的衰变可以缓解局部宇宙中H_0的测量值与宇宙微波背景涨落推断的值之间的紧张关系。衰变的暗物质可能解释了这种差异，因为它重新洗牌了物质和辐射之间的能量密度，从而使暗能量在早期占据主导地位。研究表明，宇宙微波背景各向异性功率谱的低多极幅值严重限制了迟时衰减作为H_0张力解的可行性。
It has been suggested that late-universe dark matter decays can alleviate the tension between measurements of $H_0$ in the local universe and its value inferred from cosmic microwave background fluctuations. Decaying dark matter can potentially account for this discrepancy as it reshuffles the energy density between matter and radiation and as a result allows dark energy to become dominant at earlier times. We show that the low multipoles amplitude of the cosmic microwave background anisotropy power spectrum severely constrains the feasibility of late-time decays as a solution to the $H_0$ tension.