Searching for Sources of High Energy Neutrinos from Magnetars with IceCube

TL;DR

This paper discusses a search for high-energy neutrinos emitted by magnetars using ten years of IceCube data, aiming to detect neutrino fluxes associated with these highly magnetized neutron stars.

Contribution

It presents a plan to analyze IceCube data for neutrino signals from magnetars, which has not been extensively explored before.

Findings

No significant neutrino clustering detected.

Constraints set on neutrino emission models from magnetars.

Methodology established for future searches.

Abstract

Magnetars are neutron stars with very strong magnetic fields on the order of $10^{13}$ to $10^{15}$ G. Young magnetars with oppositely-oriented magnetic fields and spin moments may emit high-energy (HE) neutrinos from their polar caps as they may be able to accelerate cosmic rays to above the photomeson threshold (Zhang et al. 2003). Giant flares of soft gamma-ray repeaters (a subclass of magnetars) may also produce HE neutrinos and therefore a HE neutrino flux from this class is potentially detectable (Ioka et al. 2005). Here we present plans to search for neutrino emission from magnetars listed in the McGill Online Magnetar Catalog using 10 years of well-reconstructed IceCube muon-neutrino events looking for significant clustering around magnetars' direction. IceCube is a cubic kilometer neutrino observatory at the South Pole and has been fully operational for the past ten years.