论文标题
从第一个J141918.9+394036中检测到的无线电爆发在绿色银行望远镜观测值中
No Radio Bursts Detected from FIRST J141918.9+394036 in Green Bank Telescope Observations
论文作者
论文摘要
FRB 121102是第一个已知的重复快速无线电爆发(FRB)源,与矮人主机银河系和紧凑的持久无线电源相关联。为了找到其他重复的FRB,在搜索矮人主机星系中的类似持续的无线电源时,发现了第一个J141918.9+394036(以下节目第一个J1419+3940)。第一个J1419+3940随后被识别为数十年时间尺度上的无线电短暂衰减,并且有人认为这是长伽马射线爆发的孤儿余星。第一个J1419+3940和FRB 121102的持续无线电源显示观察性相似性,尽管后者在亮度方面似乎是稳定的。尽管如此,如果它们具有相似的物理起源,那么第一个J1419+3940也可能包含能够产生快速无线电爆发的来源。我们报告了第一个J1419+3940在3.1 h观测值中,绿色库望远镜在2和6 GHz的观测值3.1 h期间,短期无线电爆发的未检测。与FRB 121102相比,第一个J1419+3940的距离更接近11倍,并且在1.4GHz以上表现出光滑的同步子频谱;因此,我们的搜索对爆发的敏感性比FRB 121102弱的100倍以上。我们鼓励将来的爆发搜索来限制FRB发射源的可能存在。尽管此类搜索是高风险的,但任何此类检测都可以极大地阐明FRB现象的起源。
FRB 121102, the first-known repeating fast radio burst (FRB) source, is associated with a dwarf host galaxy and compact, persistent radio source. In an effort to find other repeating FRBs, FIRST J141918.9+394036 (hereafter FIRST J1419+3940) was identified in a search for similar persistent radio sources in dwarf host galaxies. FIRST J1419+3940 was subsequently identified as a radio transient decaying on timescales of decades, and it has been argued that it is the orphan afterglow of a long gamma-ray burst. FIRST J1419+3940 and FRB 121102's persistent radio source show observational similarities, though the latter appears to be stable in brightness. Nonetheless, if they have similar physical origins, then FIRST J1419+3940 may also contain a source capable of producing fast radio bursts. We report the non-detection of short-duration radio bursts from FIRST J1419+3940 during 3.1 h of observations with the 110-m Green Bank Telescope at both 2 and 6 GHz. FIRST J1419+3940 is 11 times closer compared with FRB 121102, and exhibits an optically-thin synchrotron spectrum above 1.4GHz; our search was thus sensitive to bursts more than 100 times weaker than those seen from FRB 121102. We encourage future burst searches to constrain the possible presence of an FRB-emitting source. Although such searches are high-risk, any such detection could greatly elucidate the origins of the FRB phenomenon.