AI 中文总结
TNG50-SKIRT星图集DR2基于TNG50模拟星系样本，经SKIRT后处理生成多波段空间分辨合成星系数据，可用于星系演化等多方向观测研究。
AI 中文摘要
我们发布TNG50-SKIRT星图集（TSA）的第二次数据发布（DR2），这是一个合成的、空间分辨的星系可观测值库。该星图集通过对TNG50宇宙学流体动力学模拟中1154个红移z=0、恒星质量完整（10^9.8 M☉ < M★ < 10^12 M☉）的星系样本，使用蒙特卡洛辐射传输代码SKIRT进行后处理构建而成。与首次发布相比，TSA DR2将波长覆盖范围从紫外扩展到亚毫米波段，包含尘埃发射，并纳入了更新的恒星族群模型以及对尘埃遮蔽恒星形成区的改进处理。该星图集提供了多个观测方位的空间分辨光谱能量分布、宽带图像和物理属性图，以及可直接与未分辨观测对比的积分属性目录。我们通过广泛的质量控制验证数据产品，包括评估蒙特卡洛噪声，并利用光度与恒星形成率之间的诊断关系证明其内部一致性。TSA DR2为研究尘埃消光与发射、恒星形成示踪剂、星系形态以及不同空间尺度上的多波长标度关系提供了多功能资源，该星图集及相关数据产品已公开，旨在支持大量面向观测的星系演化研究。
英文摘要
We present the second data release (DR2) of the TNG50-SKIRT Atlas (TSA), a library of synthetic, spatially resolved galaxy observables. The atlas is constructed by post-processing a stellar-mass-complete ($10^{9.8}~{\text{M}}_\odot < M_\star < 10^{12}~{\text{M}}_\odot$) sample of 1154 $z=0$ galaxies from the TNG50 cosmological hydrodynamical simulation with the Monte Carlo radiative transfer code SKIRT. Compared to the first release, TSA DR2 extends the wavelength coverage from the ultraviolet to the submillimetre, including dust emission, and incorporates updated stellar population models together with an improved treatment of dust-enshrouded star-forming regions. The atlas provides spatially resolved spectral energy distributions, broadband images, and physical property maps for multiple viewing orientations, as well as a catalogue of integrated properties enabling direct comparison with unresolved observations. We validate the data products through extensive quality control, including an assessment of Monte Carlo noise, and demonstrate their internal consistency using diagnostic relations between luminosities and star formation rates. TSA DR2 provides a versatile resource for studies of dust attenuation and emission, star formation tracers, galaxy morphology, and multi-wavelength scaling relations across spatial scales. The atlas and associated data products are publicly released and are intended to support a wide range of observationally oriented studies of galaxy evolution.
Comments15 pages, accepted for publication in A&A
