The role of self-interacting right-handed neutrinos in galactic structure

We show that warm dark matter keV fermions (`inos') can be responsible for both core and halo galactic structure, in agreement with current astrophysical/cosmological constraints. We identify the inos with sterile right-handed neutrinos. The possible mass range of up to a few tens of keV, obtai...

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Detalles Bibliográficos
Autores principales: Argüelles, C.R., Mavromatos, N.E., Rueda, J.A., Ruffini, R.
Lenguaje:eng
Publicado: 2015
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2016/04/038
http://cds.cern.ch/record/1984522
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author Argüelles, C.R.
Mavromatos, N.E.
Rueda, J.A.
Ruffini, R.
author_facet Argüelles, C.R.
Mavromatos, N.E.
Rueda, J.A.
Ruffini, R.
author_sort Argüelles, C.R.
collection CERN
description We show that warm dark matter keV fermions (`inos') can be responsible for both core and halo galactic structure, in agreement with current astrophysical/cosmological constraints. We identify the inos with sterile right-handed neutrinos. The possible mass range of up to a few tens of keV, obtained independently from the galactic structure and dark matter astroparticle physics, points towards an important role of the right-handed neutrinos in the cosmic structure.
id cern-1984522
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling cern-19845222023-03-14T18:27:54Zdoi:10.1088/1475-7516/2016/04/038http://cds.cern.ch/record/1984522engArgüelles, C.R.Mavromatos, N.E.Rueda, J.A.Ruffini, R.The role of self-interacting right-handed neutrinos in galactic structureAstrophysics and AstronomyWe show that warm dark matter keV fermions (`inos') can be responsible for both core and halo galactic structure, in agreement with current astrophysical/cosmological constraints. We identify the inos with sterile right-handed neutrinos. The possible mass range of up to a few tens of keV, obtained independently from the galactic structure and dark matter astroparticle physics, points towards an important role of the right-handed neutrinos in the cosmic structure.It has been shown previously that the DM in galactic halos can be explained by a self-gravitating system of massive keV fermions (`inos') in thermodynamic equilibrium, and predicted the existence of a denser quantum core of inos towards the center of galaxies. In this article we show that the inclusion of self-interactions among the inos, modeled within a relativistic mean-field-theory approach, allows the quantum core to become massive and compact enough to explain the dynamics of the S-cluster stars closest to the Milky Way's galactic center. The application of this model to other galaxies such as large elliptical harboring massive central dark objects of ~ 10(9) M(⊙) is also investigated. We identify these interacting inos with sterile right-handed neutrinos pertaining to minimal extensions of the Standard Model, and calculate the corresponding total cross-section σ within an electroweak-like formalism to be compared with other observationally inferred cross-section estimates. The coincidence of an ino mass range of few tens of keV derived here only from the galactic structure, with the range obtained independently from other astrophysical and cosmological constraints, points towards an important role of the right-handed neutrinos in the cosmic structure.It has been shown previously that the DM in galactic halos can be explained by a self-gravitating system of massive keV fermions (`inos') in thermodynamic equilibrium, and predicted the existence of a denser quantum core of inos towards the center of galaxies. In this article we show that the inclusion of self-interactions among the inos, modeled within a relativistic mean-field-theory approach, allows the quantum core to become massive and compact enough to explain the dynamics of the S-cluster stars closest to the Milky Way's galactic center. The application of this model to other galaxies such as large elliptical harboring massive central dark objects of $\sim 10^9 M_\odot$ is also investigated. We identify these interacting inos with sterile right-handed neutrinos pertaining to minimal extensions of the Standard Model, and calculate the corresponding total cross-section $\sigma$ within an electroweak-like formalism to be compared with other observationally inferred cross-section estimates. The coincidence of an ino mass range of few tens of keV derived here only from the galactic structure, with the range obtained independently from other astrophysical and cosmological constraints, points towards an important role of the right-handed neutrinos in the cosmic structure.arXiv:1502.00136oai:cds.cern.ch:19845222015-01-31
spellingShingle Astrophysics and Astronomy
Argüelles, C.R.
Mavromatos, N.E.
Rueda, J.A.
Ruffini, R.
The role of self-interacting right-handed neutrinos in galactic structure
title The role of self-interacting right-handed neutrinos in galactic structure
title_full The role of self-interacting right-handed neutrinos in galactic structure
title_fullStr The role of self-interacting right-handed neutrinos in galactic structure
title_full_unstemmed The role of self-interacting right-handed neutrinos in galactic structure
title_short The role of self-interacting right-handed neutrinos in galactic structure
title_sort role of self-interacting right-handed neutrinos in galactic structure
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2016/04/038
http://cds.cern.ch/record/1984522
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