Towards determining the number of observable supermassive black hole shadows: data files

This repository contains (1) a library of synthetic spectral energy distributions (SEDs) for low-luminosity active galactic nuclei (LLAGN), and (2) several tables of black hole shadow source counts as a function of angular resolution, flux density sensitivity, and observing frequency. All of these files have been generated as part of the analysis carried out in Pesce et al. (2021). (1) The SED library has been generated using the advection-dominated accretion flow (ADAF) model described in Appendix A of Pesce et al. (2021). The model SEDs sample the space of black hole mass and mass accretion rate, ranging between 10^5 and 10^11 solar masses in black hole mass and between 10^-10 and 10^-2 times the Eddington rate in mass accretion rate. The models are organized such that the upper directory provides the logarithmic mass and the file name provides the logarithmic Eddington rate. For example, an SED for a black hole with a mass of 10^9 solar masses and an accretion rate of 10^-5 times Eddington would be located at: ./SED_library/logm=9.0/logmdot=-5.0.txt Each table contains two columns, the first listing the frequency (in log Hz, spanning 10^8 to 10^22 Hz) and the second listing the luminosity density (in log erg/s/Hz). Each table also contains header information describing the global parameters: mass (in log solar masses), log accretion rate, peak synchrotron frequency (in log Hz), and electron temperature (in log K). (2) The shadow source counts tables are split into two categories: the "population" source counts have been computed as described in Section 2 of Pesce et al. (2021), and the "interferometric" source counts have been computed as described in Section 3 of Pesce et al. (2021). The tables are organized by type and by observing frequency. For example, the tables containing the interferometric source counts for a 230 GHz observing frequency would be located at: ./source_counts/interferometric_source_counts_230GHz.txt The population tables contain three columns: the first column contains the angular resolution (in log microarcseconds), the second column contains the flux density threshold (in log Jy), the third column contains the optically thin logarithmic source counts. The interferometric tables contain five columns: the first column contains the angular resolution (in log microarcseconds), the second column contains the flux density threshold (in log Jy), the third column contains the logarithmic source counts for seeing photon rings with n >= 0, the fourth column contains the logarithmic source counts for seeing photon rings with n >= 1, and the fifth column contains the logarithmic source counts for seeing photon rings with n >= 2.本数据集仓库包含两部分内容：(1) 针对低光度活动星系核（low-luminosity active galactic nuclei, LLAGN）的合成光谱能量分布（spectral energy distributions, SEDs）库；(2) 若干组黑洞阴影（black hole shadow）源计数表格，这些源计数随角分辨率、流量密度灵敏度以及观测频率变化。所有文件均基于Pesce等人2021年的研究分析生成。 (1) 该SED库基于Pesce等人2021年研究附录A中描述的径移主导吸积流（advection-dominated accretion flow, ADAF）模型生成。模型SEDs覆盖了黑洞质量与质量吸积率的参数空间：黑洞质量范围为10^5至10^11倍太阳质量，质量吸积率范围为10^-10至10^-2倍爱丁顿率（Eddington rate）。数据目录与文件名分别对应对数黑洞质量与对数爱丁顿率，例如：质量为10^9倍太阳质量、吸积率为10^-5倍爱丁顿率的黑洞对应的SED文件路径为：./SED_library/logm=9.0/logmdot=-5.0.txt。每个表格包含两列数据：第一列为频率（单位为log Hz，覆盖范围10^8至10^22 Hz），第二列为光度密度（单位为log erg/s/Hz）。表格头部还包含全局参数说明信息：黑洞质量（以对数太阳质量为单位）、对数吸积率、同步辐射峰值频率（单位为log Hz）以及电子温度（单位为log K）。 (2) 黑洞阴影源计数表格分为两类：群体源计数（population source counts）基于Pesce等人2021年研究第2节所述方法计算，干涉测量源计数（interferometric source counts）基于该研究第3节所述方法计算。表格按类别与观测频率组织存储，例如：对应230 GHz观测频率的干涉测量源计数表格路径为：./source_counts/interferometric_source_counts_230GHz.txt。群体源计数表格包含三列数据：第一列为角分辨率（单位为log微角秒），第二列为流量密度阈值（单位为log央斯基（Jy）），第三列为薄光学近似下的对数源计数。干涉测量源计数表格包含五列数据：第一列为角分辨率（单位为log微角秒），第二列为流量密度阈值（单位为log Jy），第三列为观测到n≥0光子环（photon rings）的对数源计数，第四列为观测到n≥1光子环的对数源计数，第五列为观测到n≥2光子环的对数源计数。