A flat-spectrum candidate for a track-type high-energy neutrino emission event, the case of blazar PKS 0723-008

被引：12

作者：

Kun, E. ^{[1
]}

Biermann, P. L. ^{[2
,3
,4
,5
]}

Gergely, L. A. ^{[1
]}

机构：

[1] Univ Szeged, Inst Phys, Dom Ter 9, H-6720 Szeged, Hungary

[2] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[3] KIT, Dept Phys, POB 3640, D-76021 Karlsruhe, Germany

[4] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[5] Univ Bonn, Dept Phys & Astron, Regina Pacis Weg 3, D-53113 Bonn, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 466卷 / 01期

基金：

美国国家航空航天局;

关键词：

neutrinos; BL Lacertae objects: Individual: PKS 0723-008; BLACK-HOLE BINARY; ACTIVE GALACTIC NUCLEI; GAMMA-RAY EMISSION; RELATIVISTIC JETS; RADIO OUTBURSTS; MODELS; POWER; DISK;

D O I：

10.1093/mnrasl/slw228

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

By cross-correlating both the Parkes Catalogue and the Second Planck Catalogue of Compact Sources with the arrival direction of the track-type neutrinos detected by the IceCube Neutrino Observatory, we find the flat-spectrum blazar PKS 0723-008 as a good candidate for the high-energy neutrino event 5 (ID5). Apart from its coordinates matching those of ID5, PKS 0723-008 exhibits further interesting radio properties. Its spectrum is flat up to high Planck frequencies, and it produced a fivefold-increased radio flux density through the last decade. Based upon these radio properties we propose a scenario of binary black hole evolution leading to the observed high-energy neutrino emission. The main contributing events are the spin-flip of the dominant black hole, the formation of a new jet with significant particle acceleration and interaction with the surrounding material, with the corresponding increased radio flux. Doppler boosting from the underlying jet pointing to the Earth makes it possible to identify the origin of the neutrinos, so the merger itself is the form of an extended flat-spectrum radio emission, a key selection criterion to find traces of this complex process.

引用

页码：L34 / L38

页数：5

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