Title: Cosmic star formation history revealed by the AKARI, & Spatially-resolved spectroscopy of an E+A (Post-starburst) system Show Chinese title

Title: 宇宙恒星形成历史由AKARI揭示，以及E + A（后星爆）系统的空间分辨光谱学

Abstract: We reveal cosmic star-formation history obscured by dust using deep infrared observation with the AKARI. A continuous filter coverage in the mid-IR wavelength (2.4, 3.2, 4.1, 7, 9, 11, 15, 18, and 24um) by the AKARI satellite allows us to estimate restframe 8um and 12um luminosities without using a large extrapolation based on a SED fit, which was the largest uncertainty in previous work. We found that restframe 8um (0.38<z<2.2), 12um (0.15<z<1.16), and total infrared (TIR) luminosity functions (LFs) (0.2<z<1.6) constructed from the AKARI NEP deep data, show a continuous and strong evolution toward higher redshift. In terms of cosmic infrared luminosity density (Omega_IR), which was obtained by integrating analytic fits to the LFs, we found a good agreement with previous work at z<1.2, with Omega_IR propto (1+z)^4.4+-1.0. When we separate contributions to Omega_IR by LIRGs and ULIRGs, we found more IR luminous sources are increasingly more important at higher redshift. We found that the ULIRG (LIRG) contribution increases by a factor of 10 (1.8) from z=0.35 to z=1.4. Show Chinese abstract

Abstract: 我们通过AKARI的深红外观测揭示了被尘埃遮挡的宇宙恒星形成历史。AKARI卫星在中红外波长（2.4、3.2、4.1、7、9、11、15、18和24微米）提供了连续的滤波覆盖，使我们能够在不依赖于SED拟合的大范围外推的情况下估计静止框架8微米和12微米的光度，这在以前的工作中是最大的不确定性。我们发现，由AKARI NEP深度数据构建的静止框架8微米（0.38<z<2.2）、12微米（0.15<z<1.16）和总红外（TIR）光度函数（LFs）（0.2<z<1.6），显示出向更高红移持续且强烈的演化。就宇宙红外光度密度（Omega_IR）而言，这是通过将分析拟合到LFs进行积分得到的，我们在z<1.2时与之前的工作有很好的一致性，其中Omega_IR与(1+z)^4.4±1.0成比例。当我们按LIRGs和ULIRGs分离对Omega_IR的贡献时，我们发现越来越多的红外光度源在更高红移处变得越来越重要。我们发现，从z=0.35到z=1.4，ULIRG（LIRG）的贡献增加了10倍（1.8倍）。