arXiv 2205.094742022-05astro-ph.CO

宇宙再电离和原始星系形成的天体粒子约束

Astroparticle Constraints from Cosmic Reionization and Primordial Galaxy Formation

A. Lapi, T. Ronconi, L. Boco, F. Shankar, N. Krachmalnicoff, C. Baccigalupi, L. Danese

备注：: 28 pages, 15 figures. Accepted on Universe

摘要：

我们推导出不同的暗物质替代冷暗物质（CDM）的方案中的天体粒子约束：热遗迹暖暗物质，WDM;模糊暗物质，$ψ$ DM;自相互作用暗物质，SIDM;无菌中微子暗物质，$ν$ DM。我们的框架是基于更新的确定的高红移紫外光光度函数的原始星系的红移$z\sim 10$，在上述DM方案的数值模拟红移依赖的晕质量函数，和强大的约束宇宙的再电离历史，从最近的天体物理和宇宙学数据集。首先，我们建立了一个宇宙再电离的经验模型，其特征在于由两个参数，即逃逸分数$f_{\rm esc}$的电离光子从原始星系，和极限UV幅度$M_{\rm UV}^{\rm lim}$下，外推的UV光度函数急剧增加。其次，我们执行UV光度函数和晕质量函数的标准丰度匹配，获得UV光度和晕质量之间的关系，其形状取决于每个DM场景特定的天体粒子数量$X$（例如，WDM粒子质量）;我们利用这样的关系，在分析中引入了一个限制，从原始星系形成，在阈值晕质量方面，超过原始星系可以有效地形成恒星。第三，我们实现了顺序更新的Bayesian MCMC技术，对三个参数$f_{\rm esc}$、$M_{\rm UV}^{\rm lim}$、$X$进行联合推断，并比较不同DM场景对再电离历史的结果。最后，我们强调了我们的天体粒子估计的相关性，在预测的行为的高红移紫外光度函数在微弱的，但未探索的幅度，可能会测试的詹姆斯韦伯太空望远镜的出现。

英文摘要：

We derive astroparticle constraints in different dark matter scenarios alternative to cold dark matter (CDM): thermal relic warm dark matter, WDM; fuzzy dark matter, $ψ$DM; self-interacting dark matter, SIDM; sterile neutrino dark matter, $ν$DM. Our framework is based on updated determinations of the high-redshift UV luminosity functions for primordial galaxies out to redshift $z\sim 10$, on redshift-dependent halo mass functions in the above DM scenarios from numerical simulations, and on robust constraints on the reionization history of the Universe from recent astrophysical and cosmological datasets. First, we build up an empirical model of cosmic reionization characterized by two parameters, namely the escape fraction $f_{\rm esc}$ of ionizing photons from primordial galaxies, and the limiting UV magnitude $M_{\rm UV}^{\rm lim}$ down to which the extrapolated UV luminosity functions are steeply increasing. Second, we perform standard abundance matching of the UV luminosity function and the halo mass function, obtaining a relationship between UV luminosity and halo mass whose shape depends on an astroparticle quantity $X$ specific of each DM scenario (e.g., WDM particle mass); we exploit such a relation to introduce in the analysis a constraint from primordial galaxy formation, in terms of the threshold halo mass above which primordial galaxies can efficiently form stars. Third, we implement a sequential updating Bayesian MCMC technique to perform joint inference on the three parameters $f_{\rm esc}$, $M_{\rm UV}^{\rm lim}$, $X$, and to compare the outcomes of different DM scenarios on the reionization history. Finally, we highlight the relevance of our astroparticle estimates in predicting the behavior of the high-redshift UV luminosity function at faint, yet unexplored magnitudes, that may be tested with the advent of the James Webb Space Telescope.

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英文摘要：

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