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arXiv 2202.10076astro-ph.HEastro-ph.IM
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来自第一个CHIME/FRB快速射电暴目录的事件的模型独立分类

Model-independent classification of events from the first CHIME/FRB Fast Radio Burst catalog

Anastasia Chaikova, Dmitriy Kostunin, Sergei B. Popov

摘要:

CHIME/FRB合作最近发布了一个目录,其中包含大约5000个快速射电暴(FRB),包括它们的光谱和几个重建的属性,如信号宽度,幅度等。我们已经开发了一种独立于模型的方法,用于使用互相关和聚类算法对这些突发进行分类,这些算法应用于突发的一维强度分布(即,到作为在频率上平均的时间的函数的幅度)。使用该算法,我们确定了两个主要类别的FRB具有不同的波形形态,同时,不同的亮度温度分布。来自其中一个星系团的爆发比来自另一个星系团的事件具有更低的亮温和更大的宽度。这两组都包括来自中继器的突发和一次性事件。

英文摘要:

The CHIME/FRB collaboration has recently published a catalog containing about half a thousand fast radio bursts (FRBs) including their spectra and several reconstructed properties, like signal widths, amplitudes, etc. We have developed a model-independent approach for a classification of these bursts using cross-correlation and clustering algorithms applied to one-dimensional intensity profiles of the bursts (i.e., to amplitudes as a function of time averaged over the frequency). Using this algorithm we identified two major classes of FRBs featuring different waveform morphology, and, simultaneously, different distribution of brightness temperature. Bursts from one of the identified cluster have lower brightness temperatures and larger widths than events from the other cluster. Both groups include bursts from the repeaters and one-off events.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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