HIGHLIGHTS
- who: José A. Helayël-Neto et al. from the Departamento Astrofísica, Cosmologia e Interações Fundamentais (COSMO), Centro Brasileiro Pesquisas Físicas (CBPF), Rua Xavier , Centre (OSUC) UMS, Université d'Orléans, A rue la Férollerie, Orléans, France have published the article: Frequency variation for in vacuo photon propagation in the Standard-Model Extension, in the Journal: Eur. Phys. J. C (2019) 79:590 of /2019/
SUMMARY
Other galaxies External galaxies also possess inter-stellar magnetic_fields with strengths of several hundred pT. The IGM outside of clusters of galaxies . . .
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