The Multiwavelength Counterparts of Fast Radio Bursts
The Multiwavelength Counterparts of Fast Radio Bursts
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DOI：
10.3847/1538-4357/ab982b
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
G. Chen;V. Ravi;Wenbin Lu
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文献类型：
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作者：
G. Chen;V. Ravi;Wenbin Lu
产生河外快速射电暴（FRB）的发动机以及产生发射的机制仍然未知。许多FRB模型预测提示多波长对应物，这可以用来完善我们的知识FRB现象的这些基本面。然而，之前针对快速FRB对应物的几次有针对性的搜索没有产生检测，并且还没有达到关于预测的足够灵敏度。在这项工作中，我们展示了一种技术，以估计在各种波长的FRB对应物的能量输出和无线电波长发射之间的比率，η。我们的技术相结合的FRB人口的通量分布的结果，从几个宽场盲调查的快速瞬变从光学到TeV波段。我们提出了对η的限制，即使在现有调查中所有未分类的瞬态事件都是FRB对应物的情况下，也能改善以前的观测结果。在FRB发动机和排放机制的某些情况下，我们发现FRB对应物应该已经被检测到，从而证明我们的技术可以成功地测试η的预测。然而，FRB对应物可能潜伏在未分类的瞬态事件目录中。尽管我们的技术对FRB注量分布的不确定性具有鲁棒性，但其最终应用于精确估计或限制η将需要仔细分析多波长调查数据集中的所有候选快速瞬变事件。
The engines that produce extragalactic fast radio bursts (FRBs), and the mechanism by which the emission is generated, remain unknown. Many FRB models predict prompt multiwavelength counterparts, which can be used to refine our knowledge of these fundamentals of the FRB phenomenon. However, several previous targeted searches for prompt FRB counterparts have yielded no detections and have additionally not reached sufficient sensitivity with respect to the predictions. In this work, we demonstrate a technique to estimate the ratio, η, between the energy outputs of FRB counterparts at various wavelengths and the radio-wavelength emission. Our technique combines the fluence distribution of the FRB population with results from several wide-field blind surveys for fast transients from the optical to the TeV bands. We present constraints on η that improve upon previous observations even in the case where all unclassified transient events in existing surveys are FRB counterparts. In some scenarios for the FRB engine and emission mechanism, we find that FRB counterparts should have already been detected, thus demonstrating that our technique can successfully test predictions for η. However, it is possible that FRB counterparts are lurking among catalogs of unclassified transient events. Although our technique is robust to the present uncertainty in the FRB fluence distribution, its ultimate application to accurately estimate or bound η will require the careful analysis of all candidate fast transient events in multiwavelength survey data sets.