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Observing primordial magnetic fields through Dark Matter

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554639" target="_blank" >RIV/68378271:_____/21:00554639 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1088/1475-7516/2021/02/011" target="_blank" >https://doi.org/10.1088/1475-7516/2021/02/011</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1088/1475-7516/2021/02/011" target="_blank" >10.1088/1475-7516/2021/02/011</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Observing primordial magnetic fields through Dark Matter

  • Original language description

    Primordial magnetic fields are often thought to be the early Universe seeds that have bloomed into what we observe today as galactic and extra-galactic magnetic fields. Owing to their minuscule strength, primordial magnetic fields are very hard to detect in cosmological and astrophysical observations. We show how this changes if a part of neutral Dark Matter has a magnetic susceptibility. In this way, by studying Dark Matter one can obtain information about the properties of primordial magnetic fields, even if the latter have a comoving amplitude B-0 less than or similar to 0.01 nG. In our model Dark Matter is a stable singlet scalar x, which interacts with electromagnetism through the Rayleigh operator as chi(F mu nu F mu nu)-F-2/Lambda(2). For primordial magnetic fields present in the early Universe this operator forces the Z(2)-symmetry of the model to be spontaneously broken. Later, when the primordial magnetic field redshifts below a critical value, the symmetry is restored through an inverse phase transition. At that point the field chi begins to oscillate and acts as a magnetomorphic Dark Matter component, inheriting the properties of the primordial magnetic field space distribution. In particular, for a nearly flat spectrum of magnetic field fluctuations, the scalar chi carries a statistically anisotropic isocurvature mode. We discuss the parameter space of the model and consider the possibility that the bulk of the Dark Matter is composed of the same particles chi produced via the freeze-in mechanism.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10303 - Particles and field physics

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Cosmology and Astroparticle Physics

  • ISSN

    1475-7516

  • e-ISSN

    1475-7516

  • Volume of the periodical

    2021

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    26

  • Pages from-to

    011

  • UT code for WoS article

    000620675500011

  • EID of the result in the Scopus database

    2-s2.0-85101546550