用Spritz模拟红外天空
Simulating the infrared sky with a Spritz
摘要：
目前对星系形成和演化的流体动力学和半经验模拟很难再现红外探测到的星系的数量密度。因此，一个通用的，唯象的新的模拟工具是必要的，以重现当前和预测未来的观测在红外波长。在这项工作中，我们生成模拟目录从不同的星系种群的赫歇尔红外光度函数，以考虑在一个一致的方式不同的人口的星系和活动星系核。我们关联的光谱能量分布和物理性质，如恒星质量，恒星形成率和活动星系核的贡献，每个模拟星系使用一组广泛的经验关系。我们比较由此产生的模拟星系，提取到z $=$ 10，与一组广泛的观测关系。SPRITZ模拟将使我们能够以完全一致的方式获得当前和未来广泛的具有光度能力以及低分辨率红外光谱的设施的模拟观测，如詹姆斯韦伯太空望远镜（JWST）或起源太空望远镜（OST）。衍生的模拟目录包含星系和活动星系核，通过建设再现观测到的红外星系数密度，但它也是在协议从紫外线到远红外波长，观测到的恒星质量函数，恒星形成率与恒星质量平面和光度函数从无线电到X射线观测到的计数。因此，拟议的模拟非常适合对当前和未来的设施进行预测，特别是（但不限于）在红外波长下运行的设施。SPRITZ模拟将公开提供。
英文摘要：
Current hydrodynamical and semi-empirical simulations of galaxy formation and evolution have difficulties in reproducing the number densities of IR-detected galaxies. Therefore, a versatile, phenomenological new simulation tool is necessary to reproduce current and predict future observations at IR wavelengths. In this work we generate simulated catalogues starting from the Herschel infrared luminosity functions of different galaxy populations, in order to consider in a consistent way different populations of galaxies and active galactic nuclei. We associated a spectral energy distribution and physical properties, such as stellar mass, star-formation-rate and AGN contribution, to each simulated galaxy using a broad set of empirical relations. We compare the resulting simulated galaxies, extracted up to z$=$10, with a broad set of observational relations. The Spectro-Photometric Realisations of Infrared-selected Targets at all-z (SPRITZ) simulation will allow us to obtain in a fully consistent way simulated observations for a broad set of current and future facilities with photometric capabilities as well as low-resolution IR spectroscopy, like the James Webb Space Telescope (JWST) or the Origin Space Telescope (OST). The derived simulated catalogue contains galaxies and active galactic nuclei that by construction reproduce the observed IR galaxy number density, but it is also in agreement with the observed number counts from UV to far-IR wavelengths, the observed stellar mass function, the star-formation-rate vs. stellar mass plane and the luminosity function from the radio to the X-ray. The proposed simulation is therefore ideal to make predictions for current and future facilities, in particular, but not limited to, those operating at IR wavelengths. The SPRITZ simulation will be publicly available.
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