包括光电离和尘埃的银河系高分辨率全色光谱模型
High-Resolution Panchromatic Spectral Models of Galaxies including Photoionisation and Dust
摘要：
更新版本的尘埃辐射传输代码日出，包括模型的恒星形成区域和自洽计算的空间依赖的尘埃和PAH的排放量，提出。给定一个星系的流体动力学模拟，这个模型可以计算一个现实的2维紫外-亚毫米光谱能量分布的星系，包括从HII地区的发射线，从任何角度来看。为了模拟恒星形成区域的辐射，使用了MAPPINGSIII光电离代码。高波长分辨率（~ 1000个波长）是由日出采用的多色Monte-Carlo算法实现的。从2-D光谱能量分布，可以创建任何滤波器带或集成星系SED中的图像。使用一套盘星系的流体动力学模拟，输出的宽带图像和光谱能量分布进行了比较，从多波长的SINGS和SLUGS星系调查观察到的星系。总的来说，输出光谱能量分布显示出良好的匹配与观察到的星系的颜色范围从GALEX远紫外到水下呼吸器亚毫米波长。唯一可能的例外是160微米/850微米的颜色，与SINGS样品相比，模拟低估了“5阶”的因素。然而，这里的模拟与SLUGS星系一致，SLUGS星系始终比SINGS星系拥有大量的冷尘埃。日出模型可用于生成任意流体动力学星系模拟的模拟观测。通过这种方式，星系形成理论的预测可以直接与星系的观测进行检验。
英文摘要：
An updated version of the dust radiation transfer code Sunrise, including models for star-forming regions and a self-consistent calculation of the spatially dependent dust and PAH emission, is presented. Given a hydrodynamic simulation of a galaxy, this model can calculate a realistic 2-dimensional ultraviolet--submillimeter spectral energy distribution of the galaxy, including emission lines from HII regions, from any viewpoint. To model the emission from star-forming regions, the MAPPINGSIII photoionization code is used. The high wavelength resolution (~ 1000 wavelengths) is made possible by the polychromatic Monte-Carlo algorithm employed by Sunrise. From the 2-D spectral energy distributions, images in any filter bands or integrated galaxy SEDs can be created. Using a suite of hydrodynamic simulations of disc galaxies, the output broad-band images and spectral energy distributions are compared with observed galaxies from the multiwavelength SINGS and SLUGS galaxy surveys. Overall, the output spectral energy distributions show a good match with observed galaxies in colours ranging from GALEX far-UV to SCUBA submillimeter wavelengths. The only possible exception is the 160 micron/850 micron colour, which the simulations underestimate by a factor "of order 5" compared to the SINGS sample. However, the simulations here agree with the SLUGS galaxies, which consistently have significantly larger amounts of cold dust than the SINGS galaxies. The Sunrise model can be used to generate simulated observations of arbitrary hydrodynamic galaxy simulations. In this way, predictions of galaxy formation theories can be directly tested against observations of galaxies.
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