INFERENCES FROM THE DISTRIBUTIONS OF FAST RADIO BURST PULSE WIDTHS, DISPERSION MEASURES, AND FLUENCES
INFERENCES FROM THE DISTRIBUTIONS OF FAST RADIO BURST PULSE WIDTHS, DISPERSION MEASURES, AND FLUENCES
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DOI：
10.3847/0004-637x/818/1/19
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发表时间：
2015-05
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影响因子：
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通讯作者：
J. Katz
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文献类型：
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作者：
J. Katz
快速射电暴的宽度、色散量、色散指数和注量等因素对所有模型都有耦合约束。爆发宽度的非单调依赖性（仪器效应反卷积后）DM排除星系际介质作为散射的位置，扩大了FRB的时间。时间展宽远大于银河系高纬度地区的类星体，这意味着散射发生在靠近高密度和强湍流或不均匀性的源附近。FRB能量学与来自宇宙学距离的年轻、快速、高场恒星的超巨星脉冲一致。FRB DM的分布：（1）与膨胀云的分布不一致（如SNRs）;（2）与空间有限的源群不一致（如本地超星系团）;（3）与宇宙学距离上均匀源群的星系际分散一致。最后，FRB log N？> - log S？>关系也表明了宇宙学上的分布，除了异常明亮的洛里默爆发。
The widths, dispersion measures (DMs), dispersion indices, and fluences of Fast Radio Bursts (FRBs) impose coupled constraints that all models must satisfy. The non-monotonic dependence of burst widths (after deconvolution of instrumental effects) on DMs excludes the intergalactic medium as the location of scattering that broadens the FRBs in time. Temporal broadening far greater than that of pulsars at similar high Galactic latitudes implies that scattering occurs close to the sources where high densities and strong turbulence or heterogeneity are plausible. FRB energetics are consistent with supergiant pulses from young, fast, high-field pulsars at cosmological distances. The distribution of FRB DMs is: (1) inconsistent with that of expanding clouds (such as SNRs); (2) inconsistent with space-limited source populations (such as the local Supercluster); and (3) consistent with intergalactic dispersion of a homogeneous source population at cosmological distances. Finally, the FRB log N ?> – log S ?> relation also indicates a cosmological distribution aside from the anomalously bright Lorimer burst.