Late-time Radio and Millimeter Observations of Superluminous Supernovae and Long Gamma-Ray Bursts: Implications for Central Engines, Fast Radio Bursts, and Obscured Star Formation
Late-time Radio and Millimeter Observations of Superluminous Supernovae and Long Gamma-Ray Bursts: Implications for Central Engines, Fast Radio Bursts, and Obscured Star Formation
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DOI：
10.3847/1538-4357/abe9b8
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发表时间：
2020-10
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通讯作者：
T. Eftekhari;B. Margalit;C. Omand;E. Berger;P. Blanchard;P. Demorest;B. Metzger;K. Murase;M. Nicholl;V. Villar;P. G. Williams;K. Alexander;S. Chatterjee;D. Coppejans;J. Cordes;S. Gomez;G. Hosseinzadeh;B. Hsu;K. Kashiyama;R. Margutti;Y. Yin
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作者：
T. Eftekhari;B. Margalit;C. Omand;E. Berger;P. Blanchard;P. Demorest;B. Metzger;K. Murase;M. Nicholl;V. Villar;P. G. Williams;K. Alexander;S. Chatterjee;D. Coppejans;J. Cordes;S. Gomez;G. Hosseinzadeh;B. Hsu;K. Kashiyama;R. Margutti;Y. Yin
我们提出了迄今为止最大、最深入的超光度超新星（SLSNe）和长持续时间伽马射线爆发（LGRB）的后期射电和毫米波调查，以寻找相关的非热同步加速器发射。使用 Karl G. Jansky 甚大阵列 (VLA) 和阿塔卡马大型毫米/亚毫米阵列 (ALMA)，我们在爆炸后约 1-19 年的时间尺度内观测到了 6 和 100 GHz 的 43 个源。除了 PTF10hgi 的 6 GHz 检测以及 SLSN PTF12dam 位置附近的 6 GHz 发射（我们将其与其宿主星系相关联）之外，我们没有检测到任何来源的无线电/毫米波发射。我们使用我们的数据对磁星风星云和离轴相对论喷流造成的中央发动机排放进行限制。我们还探索了超新星喷射物的非相对论发射，并对宿主星系中模糊恒星的形成施加了限制。此外，我们使用 VLA 相控阵观测从一些源中搜索快速射电暴 (FRB)；每个事件源在大约 40 分钟内未检测到限制为 16 mJy（7σ；10 ms 持续时间）的 FRB。与理论模型的比较表明，持续的无线电监测可能会导致在≳十年的时间尺度上检测到持续的无线电发射。
We present the largest and deepest late-time radio and millimeter survey to date of superluminous supernovae (SLSNe) and long-duration gamma-ray bursts (LGRBs) to search for associated nonthermal synchrotron emission. Using the Karl G. Jansky Very Large Array (VLA) and the Atacama Large Millimeter/submillimeter Array (ALMA), we observed 43 sources at 6 and 100 GHz on a timescale of ∼ 1–19 yr post-explosion. We do not detect radio/millimeter emission from any of the sources, with the exception of a 6 GHz detection of PTF10hgi, as well as the detection of 6 GHz emission near the location of the SLSN PTF12dam, which we associate with its host galaxy. We use our data to place constraints on central engine emission due to magnetar wind nebulae and off-axis relativistic jets. We also explore nonrelativistic emission from the SN ejecta, and place constraints on obscured star formation in the host galaxies. In addition, we conduct a search for fast radio bursts (FRBs) from some of the sources using VLA phased-array observations; no FRBs are detected to a limit of 16 mJy (7σ; 10 ms duration) in about 40 minutes on source per event. A comparison to theoretical models suggests that continued radio monitoring may lead to detections of persistent radio emission on timescales of ≳ a decade.