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Galactic Constraints on Fermionic Dark Matter

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Abstract

In order to explain Galactic structures, a self-gravitating system composed of massive fermions in spherical symmetry is considered. The finite mass distribution of such a component is obtained after solving the Einstein equation for a thermal and semi-degenerate fermionic gas, described by a perfect fluid in hydrostatic equilibrium and exposed to cutoff effects (e.g. evaporation). Within this more general approach a family of density profiles arises, which explains dark matter halo constraints of the Galaxy and provides at the same time an alternative to the central black hole scenario in Sgr A*. This analysis narrows the allowed particle mass to mc2 = 48−345 keV.

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Author information

Authors and Affiliations

  1. ICRANet, Pescara, Italy

    A. Krut, C. R. Arguëlles, J. Rueda & R. Ruffini

  2. ICRA and University of Rome “Sapienza,”, Physics Department, Rome, Italy

    A. Krut, J. Rueda & R. Ruffini

  3. University of Nice-Sophia Antipolis, Nice, France

    A. Krut

  4. Instituto de Astrofisica de La Plata (CCT La Plata, CONICET, UNLP), La Plata, Argentina

    C. R. Arguëlles

  5. ICRANet-Rio, Centro Brasileiro de Pesquisas Físicas, Rio de Janeiro, Brazil

    J. Rueda & R. Ruffini

Authors
  1. A. Krut
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  2. C. R. Arguëlles
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  3. J. Rueda
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  4. R. Ruffini
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Corresponding author

Correspondence to A. Krut.

Additional information

The article is published in the original.

Paper presented at the Third Zeldovich meeting, an international conference in honor of Ya.B. Zeldovich held in Minsk, Belarus on April 23–27, 2018. Published by the recommendation of the special editors: S.Ya. Kilin, R. Ruffini, and G.V. Vereshchagin.

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Krut, A., Arguëlles, C.R., Rueda, J. et al. Galactic Constraints on Fermionic Dark Matter. Astron. Rep. 62, 898–904 (2018). https://doi.org/10.1134/S1063772918120247

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  • DOI: https://doi.org/10.1134/S1063772918120247

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