论文标题
FRB：宿主星系的色散度量
FRBs: the Dispersion Measure of Host Galaxies
论文作者
论文摘要
使用Illustristng模拟的结果，我们估计了分散度度量，这可能归因于所谓的快速无线电爆发源（FRB）所谓的宿主星系的光晕。我们的研究结果表明，与用于显示FRB适用于宇宙学测试的假设相矛盾，分散度度量及其标准偏差计算了针对给定恒星质量的宿主星系计算的标准偏差，随着红移的一般增加。这种效果不是很强的，可以使用FRB进行宇宙学测试，但是为了保留统计不确定性水平，样品中具有已知红移的FRB数量应增加15％-35％，具体取决于情况。我们显示了星系周围电离气体的各种统计特征，所得的分散度度量及其对宿主星系恒星质量，红移以及FRB源与宿主中心的预计距离的依赖。 宇宙学：理论 - 星系：光晕 - 宇宙的大规模结构
Using the results of the IllustrisTNG simulation we estimate the dispersion measure which may be attributed to halos of so called host galaxies of fast radio bursts sources (FRBs). Our results show that in contradiction to assumptions used to show the applicability of FRBs to cosmological tests, both the dispersion measure and its standard deviation calculated for host galaxies with given stellar mass in general increase with the redshift. The effect is not strong and cosmological tests using FRBs will be possible, but to preserve the level of statistical uncertainty the number of FRBs with known redshift in a sample should be increased by 15%--35% depending on circumstances. We show various statistical characteristics of ionized gas surrounding galaxies, the resulting dispersion measure and their dependence on the host galaxy stellar mass, redshift, and the projected distance of a FRB source from its host center. Cosmology: theory -- Galaxies: halos -- large-scale structure of Universe
