Neutrino production in Population III microquasars

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Microquasars (MQs) are binary systems composed by a star feeding mass to a compact object through an accretion disk. The compact object, usually a black hole, launches oppositely directed jets which are typically observed in our galaxy through their broadband electromagnetic emission. These jets are...

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Detalles Bibliográficos
Autores principales: Carulli, Agustín M., Reynoso, Matías M., Romero, Gustavo Esteban
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Astronómicas
Radiation mechanisms: non-thermal
Neutrinos; X-rays: binaries
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/125588
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-125588
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Radiation mechanisms: non-thermal
Neutrinos; X-rays: binaries
spellingShingle Ciencias Astronómicas
Radiation mechanisms: non-thermal
Neutrinos; X-rays: binaries
Carulli, Agustín M.
Reynoso, Matías M.
Romero, Gustavo Esteban
Neutrino production in Population III microquasars
topic_facet Ciencias Astronómicas
Radiation mechanisms: non-thermal
Neutrinos; X-rays: binaries
description Microquasars (MQs) are binary systems composed by a star feeding mass to a compact object through an accretion disk. The compact object, usually a black hole, launches oppositely directed jets which are typically observed in our galaxy through their broadband electromagnetic emission. These jets are considered potential galactic neutrino sources. MQs can also have been formed by the first generations of stars in the universe, i.e., Population III (Pop III) stars, which are considered essential contributors to the ionization processes that took place during the period of acosmic reionizationa. In the present work, we develop a model that accounts for the main particle processes occurring within Pop III MQ jets, with the aim to obtain the diffuse neutrino flux at the Earth. We define different zones within the jets of Pop III MQs where particle interactions occur, and primary particles (i.e protons and electrons) are injected. We solve a transport equation for each zone, including the relevant cooling and escape processes, which include p γ and p p interactions. Once we obtain the primary particle distributions, we compute the pion and muon distributions, as well as the neutrino output produced by their decays. Finally, we obtain the diffuse neutrino flux by integration over the redshift, the line-of-sight angle, and the MQs lifetime. We find that, for a range of parameters suitable for Pop III MQ jets, the most relevant site for neutrino production in the jets is the base of the inner conical jet. Additionally, if protons accelerated at the forward shock formed at terminal jet region can escape from the outer shell, they would produce further neutrinos via p γ interactions with the cosmic microwave background (CMB). The latter contribution to the diffuse neutrino flux turns out to be dominant in the range 10 7 GeV ≲ E ν ≲ 10 9 GeV , while the neutrinos produced in the inner jet could only account for a small fraction of the IceCube flux for E ν ∼ 10 5 GeV. The co-produced multiwavelength photon background is also computed and it is checked to be in agreement with observations.
format Articulo
Preprint
author Carulli, Agustín M.
Reynoso, Matías M.
Romero, Gustavo Esteban
author_facet Carulli, Agustín M.
Reynoso, Matías M.
Romero, Gustavo Esteban
author_sort Carulli, Agustín M.
title Neutrino production in Population III microquasars
title_short Neutrino production in Population III microquasars
title_full Neutrino production in Population III microquasars
title_fullStr Neutrino production in Population III microquasars
title_full_unstemmed Neutrino production in Population III microquasars
title_sort neutrino production in population iii microquasars
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/125588
work_keys_str_mv AT carulliagustinm neutrinoproductioninpopulationiiimicroquasars
AT reynosomatiasm neutrinoproductioninpopulationiiimicroquasars
AT romerogustavoesteban neutrinoproductioninpopulationiiimicroquasars
bdutipo_str Repositorios
_version_ 1764820451918348288

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