论文标题
FRB质量的环境和约束190520b
The Environment and Constraints on the Mass of FRB 190520B
论文作者
论文摘要
FRB 20190520b的最新观察结果表明，其色散度量在明显固定的界限内以及其旋转度量的逆转迅速波动。分散度度量的波动与爆发之间的间隔不相关，在分散区域的任何特征时间尺度上设置上限$ \ sim 10 \，$ s；它必须非常紧凑。分散时间延迟对频率的全部依赖性的测量可能决定了该区域的实际电子密度和大小。可以从分散区域的大小及其变化的时间尺度上的约束，将FRB源质量的下限设置在质量上。 DM和RM变化的比较导致磁场$ \ sim 500 \，μ$ g的估计值。
Recent observations of FRB 20190520B have revealed rapid fluctuation of its Dispersion Measure within apparently fixed bounds, as well as a reversal of its Rotation Measure. The fluctuations of Dispersion Measure are uncorrelated with the intervals between bursts, setting upper bounds $\sim 10\,$s on any characteristic time scale of the dispersing region; it must be very compact. Measurements of the full dependence of the dispersive time delay on frequency may determine the actual electron density and the size of this region. It is possible to set a lower bound on the mass of the FRB source from constraints on the size of the dispersing region and its time scale of variation. Comparison of the variations of DM and RM leads to an estimate of the magnetic field $\sim 500\,μ$G.
