VLBI observations of four radio quasars at $z>4$: blazars or not?

Preprint, Article English OPEN
Cao, H.M.; Frey, S.; Gabanyi, K.E.; Paragi, Z.; Yang, J.; Cseh, D.; Hong, X.Y.; An, T.;
  • Related identifiers: doi: 10.1093/mnras/stx160
  • Subject: Astrophysics - Astrophysics of Galaxies | Astrophysics - High Energy Astrophysical Phenomena
    arxiv: Astrophysics::Galaxy Astrophysics | Astrophysics::High Energy Astrophysical Phenomena | Astrophysics::Cosmology and Extragalactic Astrophysics

Blazars are active galactic nuclei (AGN) whose relativistic jets point nearly to the line of sight. Their compact radio structure can be imaged with very long baseline interferometry (VLBI) on parsec scales. Blazars at extremely high redshifts provide a unique insight i... View more
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