Neutrino production in Population III Microquasars

REYNOSO, MATÍAS MIGUEL; CARULLI, AGUSTÍN MATÍAS

La Serena

Congreso; The Second Binational Meeting AAA-SOCHIAS 2018; 2018

ASOCIACIÓN ARGENTINA DE ASTRONOMÍA

Context Population III microquasars (Pop III MQs) may have been one of the main contributorsto the reionization of the intergalactic medium (IGM). It is thought that PopIII stars were formed at redshiftsz ∼ 20 − 30, which prevents the possibility of detecting gamma rays of very high energy (E > 100 GeV).Conversely, it would be possible to detect neutrinos at the present, since they interact with matter only via theweak interaction.Aims We develop a model that accounts for neutrino production in Pop III MQs and compare the diffuse neutrinofluxes obtained with the available data from IceCube neutrino telescope.Method We solve transport equations to obtain the particle distributions at the different zones considered along thejets. We compute the distributions of primary particles (i.e. protons and electrons) in each zone, which cool downdue to radiative processes and also interact with other particle targets, to give a distribution of secondary particles(i.e. muons and pions). We then obtain the muon and pion distributions and compute their decayments, fromwhich we obtain a neutrino output. Finally, we integrate with respect to the redshift z and over the line-of-sightangle in order to obtain the diffuse neutrino flux that may be observed from the Earth.