VLBI Scrutiny of a New Neutrino-Blazar Multiwavelength-Flare Coincidence
VLBI Scrutiny of a New Neutrino-Blazar Multiwavelength-Flare Coincidence
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VLBI 对新中微子耀斑多波长耀斑巧合的研究
DOI：
10.1017/s1743921323000893
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
P. Weber
中科院分区：
文献类型：
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作者：
F. Eppel;M. Kadler;E. Ros;F. Roesch;J. Hessdoerfer;P. Benke;P. Edwards;C. Fromm;M. Giroletti;A. Gokus;J. Gómez;S. Hämmerich;D. Kirchner;Y. Kovalev;T. Krichbaum;M. Lister;C. Nanci;R. Ojha;G. Paraschos;A. Plavin;A. Readhead;J. Stevens;P. Weber
摘要近年来，越来越多的证据表明，一些高能宇宙中微子可以与处于耀斑状态的耀变体相关联。在2022年2月26日，一个新的耀变体-中微子符合被报道：冰立方探测到的类径迹中微子事件IC 220225 A与平谱射电类星体PKS 0215+015在空间上一致。像以前的协会一样，这个源被发现处于高光学和γ射线状态。此外，源显示了明亮的无线电爆发，这大大增加了真正的物理关联的可能性。在中微子事件发生后不久，我们用VLBA进行了六次观测，每月一次，并正在用Effelsberg 100米望远镜和澳大利亚紧凑型望远镜阵列监测源。在这里，我们提出的第一个结果，当代秒差距尺度的喷流结构的PKS 0215+015的总强度和偏振，以限制可能的物理过程，导致在耀变体中微子发射。
Abstract In recent years, evidence has started piling up that some high-energy cosmic neutrinos can be associated with blazars in flaring states. On 2022 February 26, a new blazar-neutrino coincidence was reported: the track-like neutrino event IC220225A detected by IceCube is spatially coincident with the flat-spectrum radio quasar PKS 0215+015. Like previous associations, this source was found to be in a high optical and γ-ray state. Moreover, the source showed a bright radio outburst, which substantially increases the probability of a true physical association. We have performed six observations with the VLBA shortly after the neutrino event with a monthly cadence and are monitoring the source with the Effelsberg 100m-Telescope, and with the Australia Compact Telescope Array. Here, we present first results on the contemporary parsec-scale jet structure of PKS 0215+015 in total intensity and polarization to constrain possible physical processes leading to neutrino emission in blazars.