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Detectability of Large Correlation Length Inflationary Magnetic Field with Cherenkov Telescopes

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Abstract

Magnetic fields occupying the voids of the large scale structure may be a relic from the Early Universe originating from either Inflation or from cosmological phase transitions. We explore the possibility of identifying the inflationary origin of the void magnetic fields and measuring its parameters with γ-ray astronomy methods. The large correlation length inflationary field is expected to impose a characteristic asymmetry of extended γ-ray emission that is correlated between different sources on the sky. We show that a set of nearby blazars for which the extended emission is observable in the 0.1–1 TeV band with CTA can be used for the test of inflationary origin of the void magnetic fields.

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Notes

  1. The “analysis caveats” page of Fermi Science Support Center, https://fermi.gsfc.nasa.gov/ssc/data/analysis/caveats.html recommends the use of Fermi/LAT spectra up to 1 TeV, because of the lack of validation of the Instrument Response Functions (IRFs) in the 1–3 TeV energy range. Our comparison of Fermi/LAT and Cherenkov telescope spectra of bright blazars shown in Fig. 6 shows that the Fermi/LAT measurements in this energy range agree with those of other γ-ray telescopes.

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ACKNOWLEDGMENTS

The work of A.N., G.L., M.R., and D.S. has been supported in part by the French National Research Agency (ANR) grant ANR-19-CE31-0020, work of A.K. was supported in part by Russian Science Foundation grant 20-42-09010. A.K.’s stay in the APC laboratory was provided by the “Vernadsky” scholarship of the French embassy in Russia. This work has made use of the Infinity Cluster hosted by Institut d’Astrophysique de Paris. We thank Stéphane Rouberol for running this cluster smoothly for us. This work has been done within the Aquila Consortium (https://www.aquila-consortium.org).

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Authors and Affiliations

  1. Université de Paris, CNRS, Astroparticule et Cosmologie, F-75006, Paris, France

    A. Korochkin, A. Neronov, M. Ramsøy & D. Semikoz

  2. Institute for Nuclear Research of the Russian Academy of Sciences, 117312, Moscow, Russia

    A. Korochkin & D. Semikoz

  3. Novosibirsk State University, 630090, Novosibirsk, Russia

    A. Korochkin

  4. Laboratory of Astrophysics, Ecole Polytechnique Federale de Lausanne, 1015, Lausanne, Switzerland

    A. Neronov

  5. Institut dAstrophysique de Paris (IAP), CNRS & Sorbonne Université, F-75014, Paris, France

    G. Lavaux & M. Ramsøy

  6. National Research Nuclear University MEPHI (Moscow Engineering Physics Institute), 115409, Moscow, Russia

    D. Semikoz

Authors
  1. A. Korochkin
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  2. A. Neronov
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  3. G. Lavaux
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  4. M. Ramsøy
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  5. D. Semikoz
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Correspondence to D. Semikoz.

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This article was written for the special JETP issue dedicated to centenary of A.E. Chudakov

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Korochkin, A., Neronov, A., Lavaux, G. et al. Detectability of Large Correlation Length Inflationary Magnetic Field with Cherenkov Telescopes. J. Exp. Theor. Phys. 134, 498–505 (2022). https://doi.org/10.1134/S1063776122040057

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  • DOI: https://doi.org/10.1134/S1063776122040057

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