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[[UTAPwiki/セミナー/初期宇宙・相対論速報]] *Title: One-loop effect of 21-cm power spectrum [#ub283bde] *** 15:00- [#d08e82cf] *Title: One-loop effect of 21-cm power spectrum [#ub283bde] **Speaker: Daisuke Yamauchi [#m9ea3f5e] In this talk, I discuss the one-loop effect due to the nonlinear growth of structure in the context of the 21-cm line during dark ages (30<z<100). Observations of the redshifted 21-cm line of neutral hydrogen open up a new window for observational cosmology. Since during dark ages most scales remain linear and the nonlinear growth is less effective, we can in principle easily obtain predictable signals and use a large number of Fourier samples which would drastically reduce the noise. In this talk, I briefly review the impact of the dark age's 21-cm line on cosmology and I quantify the effect of the one-loop corrections on the 21-cm power spectrum. reference: Yamauchi, 2203.15599 Floss, de Wild, Meerburg, Koopmans, 2201.08843 Munoz, Ali-Haimoud, Kamionkowski, PRD92, 083508 (2015) |