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arXiv 2202.04091astro-ph.COastro-ph.GAastro-ph.HE
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来自射电星系叶宇宙分布的非热次级CMB各向异性

The non-thermal secondary CMB anisotropies from a cosmic distribution of radio galaxy lobes

Sandeep Kumar Acharya, Subhabrata Majumdar, Biman B. Nath

摘要:

目前和即将到来的高角分辨率和多频实验,以及准备探索丰富的景观二次CMB各向异性。在这种情况下,我们计算的第一次,CMB波动的功率谱从宇宙学分布的巨型射电星系的演变叶。我们还明确考虑了非热电子分布,这对CMB角功率谱的推断具有重要意义。我们计算平均全局非热y失真,\ynt。对于观测上合理分布的喷流光度范围内的$10^{45}-10^{47}$ ergs $^{-1}$,我们发现\ynt是小于$10^{-5}$,因此没有违反COBE的限制,如前所述。使用非热SZ的独特的光谱依赖性,我们表明,\ynt的检测可以在$\gtrsim 5σ$的水平,从未来的PIXIE样的实验,我们准确地理解前景。射电瓣的总非热SZ功率谱$C^{NT}_\ell$在$\ell \sim 3000$处达到峰值,其幅度为星系团热SZ功率谱的$\sim 1\%$。一个检测的$C^{NT}_\ell$,与PIXIE样的灵敏度实验,可以导致$\sim 5σ$约束喷流光度的质量依赖性与约束变得,至少,十倍更好的建议更雄心勃勃的CMB-HD调查。这将进一步导致对中心黑洞质量与宿主晕质量标度关系的最严格约束。

英文摘要:

Current and upcoming high angular resolution and multi-frequency experiments are well poised to explore the rich landscape of secondary CMB anisotropies. In this context, we compute for the first time, the power spectrum of CMB fluctuations from a cosmological distribution of evolving lobes of giant radio galaxies. We, also, explicitly take into account the non-thermal electron distribution, which has important implications for the inference of the CMB angular power spectrum. We calculate the mean global non-thermal y-distortion, \ynt. For observationally reasonable distribution of the jet luminosities in the range of $10^{45}-10^{47}$ ergs$^{-1}$, we find \ynt to be less than $10^{-5}$, and hence not violating the COBE limit as previously claimed. Using the unique spectral dependence of the non-thermal SZ, we show that a detection of \ynt can be within reach at the level of $\gtrsim 5σ$ from a future PIXIE-like experiment provided we understand the foregrounds precisely. The total non-thermal SZ power spectrum, $C^{NT}_\ell$, from the radio lobes peaks at $\ell \sim 3000$ with an amplitude $\sim 1\%$ of thermal SZ power spectrum from galaxy clusters. A a detection of the $C^{NT}_\ell$, with a PIXIE-like sensitivity experiment, can lead to $\sim 5σ$ constraint on the mass dependence of the jet luminosity with the constraint becoming, at least, ten times better for the proposed more ambitious CMB-HD survey. This will, further, lead to the tightest constrain on the central black hole mass -to- host halo mass scaling relations.

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