High-energy neutrinos from Population III Microquasars

AGUSTÍN M. CARULLI; MATIAS M. REYNOSO

Buenos Aires

Conferencia; Dark Side of the Universe 2019; 2019

Departamento de Física de UBA

Microquasars (MQs) are binary systems composed by a star which feeds mass to a compact object through an accretion disk. The compact object, usually a black hole (BH), launches opositely directed jets which are typically observed in our galaxy through their broadband electromagnetic emission. MQs could have also been formed by the first generations of stars in the universe, i.e., Population III (Pop III) stars. Such Pop III MQs could have been essential contributors to the intergalactic medium ionization processes that took place during the period known as "cosmic reionization". Unlike gamma rays, which would have been absorbed in their cosmic travelling through the long distances involved, the neutrinos produced in these sources may plausibly leave their trail in presen detectors such as the IceCube Neutrino Observatory. In the present work, we develop a model that accounts for the main particle processes occuring within Pop III MQ jets, with the purpose of obtaining a diffuse neutrino flux that may be observed from the Earth, and comparing the results with IceCube data.