학술논문
VLBI Scrutiny of a New Neutrino-Blazar Multiwavelength-Flare Coincidence
Document Type
Working Paper
Author
Eppel, F.; Kadler, M.; Ros, E.; Roesch, F.; Hessdoerfer, J.; Benke, P.; Edwards, P. G.; Fromm, C. M.; Giroletti, M.; Gokus, A.; Gomez, J. L.; Haemmerich, S.; Kirchner, D.; Kovalev, Y. Y.; Krichbaum, T. P.; Lister, M. L.; Nanci, C.; Ojha, R.; Paraschos, G. F.; Plavin, A.; Readhead, A. C. S.; Stevens, J.; Weber, P.
Source
Subject
Language
Abstract
In the past years, evidence has started piling up that some high-energy cosmic neutrinos can be associated with blazars in flaring states. On February 26, 2022, a new blazar-neutrino coincidence has been 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 ${\gamma}$-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.
Comment: 4 pages, 2 figures, IAU Symposium 375: The Multimessenger Chakra of Blazar Jets
Comment: 4 pages, 2 figures, IAU Symposium 375: The Multimessenger Chakra of Blazar Jets