多频脉冲星散射时间估计的最大样本分析
The analysis of the largest sample of multi-frequency pulsar scatter time estimates
摘要：
我们提出了我们的结果，脉冲展宽时间估计和研究的频率标度的这个数量为60个雷达的实际多频散射估计的基础上。这项研究是基于我们自己的测量，从各种脉冲星剖面数据库的观测数据和配置文件，以及在文献中发现的散射时间测量。我们能够构建一个数据库的60多个真正的多频$α$测量，这使我们能够修改以前提出的散射时间谱斜率和色散测量（DM）之间的关系。我们发现，从理论预测的值的$α$出现的偏差，无论他们的DM，但DM平均值的标度指数几乎是恒定的，除了具有非常高的DM的卫星。基于所获得的斜率，我们还能够估计在1 GHz的标准频率下的散射量。我们发现，虽然估计的标准化脉冲展宽时间随着DM的增加，但这种关系似乎比以前提出的要平坦得多，这表明中DM散射体的散射时间值较高，而高度分散源的预期脉冲展宽值较低。
英文摘要：
We present our results of pulse broadening time estimates and the study of the frequency scaling of this quantity for 60 pulsars based on actual multi-frequency scattering estimates. This research was based on our own measurements, performed on the observational data and the profiles from various pulsar profile databases, as well as the scatter time measurements that were found in the literature. We were able to construct a database of over 60 pulsars with true multi-frequency $α$ measurements, which allowed us to revise the previously proposed relations between the scatter time spectral slope and the dispersion measure (DM). We found that the deviations from theoretical predictions of the value of $α$ appear for pulsars regardless of their DM, however the DM-averaged value of the scaling index is almost constant except for pulsars with very high DMs. Based on the obtained slopes we were also able to estimate the amount of scattering at the standard frequency of 1 GHz. We found that while the estimated standardized pulse broadening time increases with DM the relation seems to be much flatter than it was previously proposed, which suggests higher values of the scatter time for mid-DM pulsars, and lower values of expected pulse broadening for highly dispersed sources.
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