A Search for Late-time Radio Emission and Fast Radio Bursts from Superluminous Supernovae
A Search for Late-time Radio Emission and Fast Radio Bursts from Superluminous Supernovae
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DOI：
10.3847/1538-4357/ab4adb
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
C. Law;C.M.B. Omand;K. Kashiyama;K. Murase;G. Bower;K. Aggarwal;S. Burke-Spolaor;B. Butler
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文献类型：
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作者：
C. Law;C.M.B. Omand;K. Kashiyama;K. Murase;G. Bower;K. Aggarwal;S. Burke-Spolaor;B. Butler
我们给出了从一颗I型超光超新星(SLSNe-I)样本中寻找晚期射电发射和快速射电爆发(FRB)的结果。我们使用卡尔·G·詹斯基甚大天线阵，以3 GHz的频率观测了10个5岁以上的SLSN-I。我们搜索了快速采样的能见度来寻找FRB，并使用同样的数据对磁星驱动的超新星模型中预期的晚期射电发射进行了深入的成像搜索。没有发现任何FRb。一颗SLSN-I，PtF10Hgi，在深成像中被探测到，对应于1.2×1028erg S−1的光度。这一光度，结合最近Eftekhari等人对PtF10Hgi的6 GHz探测，支持了这样的解释，即它是由一颗年轻的、快速旋转的(∼毫秒自旋周期)磁星提供动力的，其∼15 M⊙是部分电离抛射的。总的来说，我们的观测与SLSNe-I由具有快速自旋周期的中子星提供的能量最一致，尽管大多数需要比推论的PtF10Hgi更多的自由吸收。我们预测，在更高频率或不久的将来，射电观测将探测到这些系统，并开始限制年轻脉冲星及其诞生环境的性质。
We present results of a search for late-time radio emission and fast radio bursts (FRBs) from a sample of type-I superluminous supernovae (SLSNe-I). We used the Karl G. Jansky Very Large Array to observe 10 SLSN-I more than 5 yr old at a frequency of 3 GHz. We searched fast-sampled visibilities for FRBs and used the same data to perform a deep imaging search for late-time radio emission expected in models of magnetar-powered supernovae. No FRBs were found. One SLSN-I, PTF10hgi, is detected in deep imaging, corresponding to a luminosity of 1.2 × 1028 erg s−1. This luminosity, considered with the recent 6 GHz detection of PTF10hgi in Eftekhari et al., supports the interpretation that it is powered by a young, fast-spinning (∼ms spin period) magnetar with ∼15 M⊙ of partially ionized ejecta. Broadly, our observations are most consistent with SLSNe-I being powered by neutron stars with fast spin periods, although most require more free–free absorption than is inferred for PTF10hgi. We predict that radio observations at higher frequencies or in the near future will detect these systems and begin constraining properties of the young pulsars and their birth environments.