论文标题
用动力学Sunyaev Zel'Dovich探测氦气回离
Probing helium reionization with kinetic Sunyaev Zel'dovich tomography
论文作者
论文摘要
氦气的电源预计将在红移$ z \ sim3 $上发生，并对类星体种群，银河系形成和播层间培养基的形态产生重要影响，但对该过程却鲜为人知。在这里，我们表明，基于CMB测量和星系调查的组合，动力学Sunyaev-Zeldovich（KSZ）断层扫描可用于推断原始氦的丰度以及氦恢复的时间和持续时间。我们发现，在不久的将来，Vera Rubin天文台和CMB-S4的高显着检测可以预期。氦回离的更强大的表征将需要下一代实验，例如Megamapper（提议的DESI继承者）和CMB-HD。
Reionization of helium is expected to occur at redshifts $z\sim3$ and have important consequences for quasar populations, galaxy formation, and the morphology of the intergalactic medium, but there is little known empirically about the process. Here we show that kinetic Sunyaev-Zeldovich (kSZ) tomography, based on the combination of CMB measurements and galaxy surveys, can be used to infer the primordial helium abundance as well as the time and duration of helium reionization. We find a high-significance detection at ${\sim10σ}$ can be expected from Vera Rubin Observatory and CMB-S4 in the near future. A more robust characterization of helium reionization will require next-generation experiments like MegaMapper (a proposed successor to DESI) and CMB-HD.
