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Probing the low-energy spectrum of non-thermal electrons in galaxy clusters with soft gamma ray observations

  • P. MarchegianiEmail author
Original Article
  • 32 Downloads

Abstract

In this paper we study the possibility of probing the low-energy part of the spectrum of non-thermal electrons in galaxy clusters by detecting their non-thermal bremsstrahlung (NTB) emission in the soft gamma ray band, using instruments like e-ASTROGAM. Using the Coma cluster as a reference case, we find that, for very low values of the minimum energy of the electrons, in principle the NTB is detectable, but this situation is possible only for conditions that can be maintained only for a short time compared to the cluster lifetime. The possibility of constraining the low energy spectrum of non-thermal electrons through NTB is therefore hard to achieve in next years.

Keywords

Gamma rays: galaxies: clusters Galaxies: clusters: general 

Notes

Acknowledgements

This work is based on the research supported by the South African Research Chairs Initiative of the Department of Science and Technology and National Research Foundation of South Africa (Grant No. 77948). PM acknowledges support from the Department of Science and Technology/National Research Foundation (DST/NRF) Square Kilometre Array (SKA) post-graduate bursary initiative under the same Grant. I thank the Referee for useful comments and suggestions.

References

  1. Ackermann, M., et al.: Astrophys. J. Lett. 717, L71 (2010) ADSCrossRefGoogle Scholar
  2. Ackermann, M., et al.: Astrophys. J. 819, 149 (2016) ADSCrossRefGoogle Scholar
  3. Ade, P.A.R., et al.: Astron. Astrophys. 594, A13 (2016) CrossRefGoogle Scholar
  4. Bonafede, A., Feretti, L., Murgia, M., et al.: Astron. Astrophys. 513, A30 (2010) CrossRefGoogle Scholar
  5. Bonamente, M., Lieu, R., Joy, M.K., Nevalainen, J.H.: Astrophys. J. 576, 688 (2002) ADSCrossRefGoogle Scholar
  6. Bowyer, S., Korpela, E.J., Lampton, M., Jones, T.W.: Astrophys. J. 605, 168 (2004) ADSCrossRefGoogle Scholar
  7. Briel, U.G., Henry, J.P., Böhringer, H.: Astron. Astrophys. 259, L31 (1992) ADSGoogle Scholar
  8. Brunetti, G., Setti, G., Feretti, L., Giovannini, G.: Mon. Not. R. Astron. Soc. 320, 365 (2001) ADSCrossRefGoogle Scholar
  9. Colafrancesco, S., Blasi, P.: Astropart. Phys. 9, 227 (1998) ADSCrossRefGoogle Scholar
  10. Colafrancesco, S., Marchegiani, P.: Astron. Astrophys. 484, 51 (2008) ADSCrossRefGoogle Scholar
  11. Colafrancesco, S., Marchegiani, P.: Astron. Astrophys. 535, A108 (2011) ADSCrossRefGoogle Scholar
  12. Colafrancesco, S., Marchegiani, P., Palladino, E.: Astron. Astrophys. 397, 27 (2003) ADSCrossRefGoogle Scholar
  13. Colafrancesco, S., Marchegiani, P., Buonanno, R.: Astron. Astrophys. 527, L1 (2011) ADSCrossRefGoogle Scholar
  14. Colafrancesco, S., Emritte, M.S., Mhlahlo, N., Marchegiani, P.: Astron. Astrophys. 566, A42 (2014) ADSCrossRefGoogle Scholar
  15. de Angelis, A., et al.: J. High Energy Astrophys. 19, 1 (2018) ADSCrossRefGoogle Scholar
  16. Deiss, B.M., Reich, W., Lesch, H., Wielebinski, R.: Astron. Astrophys. 321, 55 (1997) ADSGoogle Scholar
  17. Enßlin, T.A., Lieu, R., Biermann, P.L.: Astron. Astrophys. 344, 409 (1999) ADSGoogle Scholar
  18. Feretti, L., Giovannini, G., Govoni, F., Murgia, M.: Astron. Astrophys. Rev. 20, 54 (2012) ADSCrossRefGoogle Scholar
  19. Gastaldello, F., et al.: Astrophys. J. 800, 139 (2015) ADSCrossRefGoogle Scholar
  20. Huber, B., Tchernin, C., Eckert, D., et al.: Astron. Astrophys. 560, A64 (2013) CrossRefGoogle Scholar
  21. Hurier, G.: Astron. Astrophys. 596, A61 (2016) ADSCrossRefGoogle Scholar
  22. Lieu, R., Mittaz, J., Bowyer, S., et al.: Science 274, 1335 (1996) ADSCrossRefGoogle Scholar
  23. Lieu, R., Ip, W.-H., Axford, W.I., Bonamente, M.: Astrophys. J. 510, L25 (1999) ADSCrossRefGoogle Scholar
  24. Longair, M.: High Energy Astrophysics. Cambridge University Press, Cambridge (1994) CrossRefGoogle Scholar
  25. Marchegiani, P., Colafrancesco, S.: Mon. Not. R. Astron. Soc. 452, 1328 (2015) ADSCrossRefGoogle Scholar
  26. Marchegiani, P., Colafrancesco, S.: Mon. Not. R. Astron. Soc. 469, 4644 (2017) ADSCrossRefGoogle Scholar
  27. Perola, G.C., Reinhardt, M.: Astron. Astrophys. 17, 432 (1972) ADSGoogle Scholar
  28. Petrosian, V.: Astrophys. J. 557, 560 (2001) ADSCrossRefGoogle Scholar
  29. Prokhorov, D.A., Churazov, E.M.: Astron. Astrophys. 567, A93 (2014) ADSCrossRefGoogle Scholar
  30. Sarazin, C.L.: Astrophys. J. 520, 529 (1999) ADSCrossRefGoogle Scholar
  31. Sarazin, C.L., Lieu, R.: Astrophys. J. 494, L177 (1998) ADSCrossRefGoogle Scholar
  32. Schlickeiser, R.: Cosmic Ray Astrophysics. Springer, Berlin (2002) CrossRefGoogle Scholar
  33. Thierbach, M., Klein, U., Wielebinski, R.: Astron. Astrophys. 397, 53 (2003) ADSCrossRefGoogle Scholar
  34. Vazza, F., Brüggen, M.: Mon. Not. R. Astron. Soc. 437, 2291 (2014) ADSCrossRefGoogle Scholar
  35. Wittor, D., Vazza, F., Brüggen, M.: Galaxies 4, 71 (2016) ADSCrossRefGoogle Scholar

Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.School of PhysicsUniversity of the WitwatersrandJohannesburgSouth Africa

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