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

Abstract

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.

This version 5 pages, 3 figures, 1 table. Published in MNRAS Letters

References in corpus (9)

• The power of relativistic jets is larger than the luminosity of their accretion disks
• MOJAVE: Monitoring of Jets in AGN with VLBA Experiments. V. Multi-epoch VLBA Images
• A possible close supermassive black-hole binary in a quasar with optical periodicity
• Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment
• Fermi/LAT broad emission line blazars
• The First Spectroscopically Resolved Sub-parsec Orbit of a Supermassive Binary Black Hole
• The spin-flip phenomenon in supermassive black hole binary mergers
• Internal entrainment and the origin of jet-related broad-band emission in Centaurus A
• Neutrinos from active black holes, sources of ultra high energy cosmic rays

Cited by in corpus (3)

• Extragalactic neutrino emission induced by Supermassive and Stellar Mass Black Hole mergers
• A self-lensing supermassive binary black hole at radio frequencies: the story of Spikey continues
• A two-step strategy to identify episodic sources of gravitational waves and high energy neutrinos in starburst galaxies