VOIIVHII_lookupTable

This is a 6D lookup table computed by HIILines (https://github.com/Sheng-Qi-Yang/HIILines). It takes the HII region gas density, metallicity, temperature, and the incident spectrum. It provides OIII/HII region volume ratios and OII/HII region volume ratios that can be used to post-process ISM emission line signals for high-resolution simulations. The 'age' field lists an array of stellar population age grid in unit of Gyr. The 'metallicity' field lists an array of log_10 (Z_*) grid. Here Z_* is the stellar metallicity in unit of solar metallicity. 'age' and 'metallicity' fields determines the shape of stellar radiation spectra, provided by FSPS lookup table (https://zenodo.org/record/6338462 SSP_Spectra_Conroy-et-al_v2.5_imfChabrier.hdf5) The 'logQ' field lists an array of log_10(Q_HI) grid. Here Q_HI is the hydrogen ionization photon generation rate of the stellar population in unit of s^-1. This field determines the amplitude of the stellar radiation spectra. The 'lognH' field lists an array of log_10(n_H) grid. Here n_H is the HII region gas density in unit of cm^-3. The 'logZ' field lists an array of log_10(Z_gas) grid. Here Z_gas is the HII region gas-phase metallicity in unit of solar metallicity. The 'T4' field lists an array of T/10000 K grid. Here T is the HII region gas temperature in unit of K. The 'VOII2VHII' and 'VOIII2VHII' fields provides a 6D lookup table of OIII and OII volume correction factors given the above 6 parameters. As an example, a VOII/VHII function can be defined as: VOII2VHIIf = scipy.interpolate.RegularGridInterpolator((logQGrid,lognHGrid,logZismGrid,T4Grid,logZstarGrid,ageGrid),VOII2VHII)本数据集为基于HIILines（https://github.com/Sheng-Qi-Yang/HIILines）计算得到的六维查找表。该数据集以H II区（HII region）气体密度、金属丰度、温度以及入射光谱作为输入参数，可输出OIII/H II区体积比与OII/H II区体积比，用于对高分辨率模拟中的星际介质（Interstellar Medium, ISM）发射线信号进行后处理。 "age"字段存储以吉年（Gyr）为单位的恒星群体年龄网格数组。 "metallicity"字段存储log₁₀(Z_*)的网格数组，其中Z_*为以太阳金属丰度为单位的恒星金属丰度。 "age"与"metallicity"字段共同决定恒星辐射光谱的形态，相关光谱由恒星群体合成（Stellar Population Synthesis, FSPS）查找表（https://zenodo.org/record/6338462 SSP_Spectra_Conroy-et-al_v2.5_imfChabrier.hdf5）提供。 "logQ"字段存储log₁₀(Q_HI)的网格数组，其中Q_HI为恒星群体的氢电离光子产生率，单位为s⁻¹，该字段决定恒星辐射光谱的振幅。 "lognH"字段存储log₁₀(n_H)的网格数组，其中n_H为以cm⁻³为单位的H II区气体密度。 "logZ"字段存储log₁₀(Z_gas)的网格数组，其中Z_gas为以太阳金属丰度为单位的H II区气相金属丰度。 "T4"字段存储T/10000 K的网格数组，其中T为以开尔文（K）为单位的H II区气体温度。 "VOII2VHII"与"VOIII2VHII"字段提供了基于上述六个参数的OIII与OII体积校正因子六维查找表。示例如下，可定义VOII/VHII函数： VOII2VHIIf = scipy.interpolate.RegularGridInterpolator((logQGrid,lognHGrid,logZismGrid,T4Grid,logZstarGrid,ageGrid),VOII2VHII)