K2-18b-Like Mini-Neptune around Sun Grids

This database provides the grids used during my summer 2025 internship at NASA Ames, and are used in many of the jupyter notebook files provided in the attached github link that summarize the project. The project focused on differentiating mini-Neptune and terrestrial (namely, Modern and Archean Earth) reflected spectras in anticipation for new exoplanet initial detections with Habitable Worlds Observatory. This was done by creating grids of mini-Neptune structures that were K2-18b like around Sun-like stars, ranging over the following parameters: Total Flux: 0.1 - 2.0 x Solar Planet Metallicity: 3 - 100 x Solar Internal Temperature (Tint): 20 - 200 K Eddy Diffusion Coefficient (Kzz): 10^5 - 10^9 cm^2/s Phase: relative to the observer and location in orbit, this describes how much of the face of the planet we are able to see, with planet/star flux decreasing as phase increases. ~ 0 - 170° The PICASO_climate_fv.h5 grid utilizes the open source code, PICASO, that can calculate a temperature-pressure profile of these mini-Neptunes that assumes energy conservation at every atmospheric layer (and chemical equilibrium). This includes a sample of 160 different mini-Neptunes. The Photochem_1D_fv.h5 grid utilizes the open source code, Photochem, a 1D photochemical model open source code that calculates molecular abundances that have reached a steady state after accounting for temperature-pressure gradients, UV photolysis, and vertical mixing. This includes a sample of 480 different mini-Neptunes. The ReflectedSpectra_fv.h5 grid utilizes the reflected spectra calculations done in PICASO to provide a sample of 8640 different mini-Neptunes. The following links are to PICASO & Photochem githubs: https://github.com/natashabatalha/picaso.git https://github.com/Nicholaswogan/photochem.git本数据库收录了我2025年夏季于美国国家航空航天局艾姆斯研究中心（NASA Ames）实习期间使用的网格数据，这些数据被用于附件GitHub链接中汇总该研究项目的诸多Jupyter Notebook文件内。 本项目聚焦于区分迷你海王星（mini-Neptune）与类地行星（即现代地球与太古地球）的反射光谱，为宜居世界天文台（Habitable Worlds Observatory）即将开展的系外行星首次探测任务做好准备。研究通过构建类太阳恒星周围、类似K2-18b的迷你海王星结构网格完成该目标，网格覆盖以下参数范围： - 总辐照度：0.1~2.0倍太阳辐照度 - 行星金属丰度：3~100倍太阳金属丰度 - 内部温度（Tint）：20~200 K - 涡流扩散系数（Eddy Diffusion Coefficient, Kzz）：10^5~10^9 cm²/s - 相位角：相对于观测者与轨道位置，该参数描述可见行星盘面占比，行星与恒星的辐照度随相位角增大而降低，取值范围约为0~170° 本次提供的网格数据集包含三个文件： 1. PICASO_climate_fv.h5网格：采用开源代码PICASO构建，该代码可计算迷你海王星的温度-压强剖面，其假设每层大气均满足能量守恒与化学平衡条件，该数据集包含160个不同迷你海王星样本。 2. Photochem_1D_fv.h5网格：采用开源代码Photochem构建，这是一款一维光化学模型开源代码，可在考虑温度-压强梯度、紫外光解与垂直混合的条件下，计算达到稳态的分子丰度，该数据集包含480个不同迷你海王星样本。 3. ReflectedSpectra_fv.h5网格：基于PICASO的反射光谱计算方法构建，包含8640个不同迷你海王星样本。 以下为PICASO与Photochem的开源代码GitHub仓库链接： https://github.com/natashabatalha/picaso.git https://github.com/Nicholaswogan/photochem.git