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Upper bounds on matter-antimatter admixture from gamma-ray observations of colliding clusters of galaxies with the Fermi Large Area Telescope
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.ORCID iD: 0000-0001-6511-4330
2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 91, no 8, 083002Article in journal (Refereed) Published
Abstract [en]

We examined whether significant constraints on matter-antimatter admixture can be derived from gamma-ray observations of colliding clusters of galaxies with Fermi-LAT. We selected ten known systems of colliding clusters of galaxies for the analysis and computed the upper bounds on matter-antimatter admixture in these systems, which range from 7×10−9 to 2×10−6. This allowed us to exclude a symmetric universe on scales of order ∼20  Mpc at the confidence level of 99.9%. Adopting the number of systems of colliding galaxy clusters from the Marenostrum Universe cosmological simulation, we checked if the Fermi-LAT second source catalog contains a sufficient number of gamma-ray sources to provide us with the required number of sources possibly associated with pp¯annihilation from cluster-anticluster collisions. We found that a matter-antimatter-symmetric universe is strongly ruled out on scales of order ∼20  Mpc if a matter-antimatter admixture in these bullet-like systems is of f≳10−5, and on scales of order ∼400  Mpc if f≳10−4.

Place, publisher, year, edition, pages
2015. Vol. 91, no 8, 083002
Keyword [en]
gamma-ray, gamma-ray sources, gamma-ray bursts, Origin and formation of the Universe
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-42744DOI: 10.1103/PhysRevD.91.083002ISI: 000352156100002OAI: oai:DiVA.org:lnu-42744DiVA: diva2:807171
Available from: 2015-04-22 Created: 2015-04-22 Last updated: 2017-04-12Bibliographically approved

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Prokhorov, Dmitry
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • text
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