论文标题
宇宙电离和原始星系形成的天线粒子约束
Astroparticle Constraints from Cosmic Reionization and Primordial Galaxy Formation
论文作者
论文摘要
我们在不同的暗物质情景中得出了Astroparticle的约束，替代了冷暗物质（CDM）：热遗物温暖的暗物质，WDM；模糊的暗物质，$ψ$ dm; SIDM自我互动的暗物质；无菌中微子暗物质，$ν$ dm。我们的框架是基于对原始星系的高红移紫外线光度功能的更新确定，以呈红移$ z \ sim 10 $，依赖于红移依赖的光晕质量在数值模拟的上述DM场景中起作用，以及在最近的天体学数据和宇宙校园中的强大限制。 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.其次，我们执行UV光度函数和光晕质量函数的标准丰度匹配，获得了UV光度和光晕质量之间的关系，它们的形状取决于每个DM场景的Astroparticle数量$ x $（例如WDM粒子质量）；我们利用这种关系来在分析中引入原始星系形成的约束，这是根据阈值光环质量的质量，而原始星系可以有效地形成恒星。第三，我们实施了一个顺序更新贝叶斯MCMC技术，以对三个参数进行联合推断$ f _ {\ rm ens eSc} $，$ m _ {\ rm uv}^{\ rm lim} $，$ x $，并比较重新离子历史上不同DM方案的外观。最后，我们强调了我们的Astroparticle估计值在预测淡淡的紫外线光度在微弱但未开发的幅度上的行为方面的相关性，可以随着詹姆斯·韦伯（James Webb）空间望远镜的出现进行测试。
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.
