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Krezinger, Máté (author), Perger, Krisztina (author), Gabányi, Krisztina Éva (author), Frey, Sándor (author), Gurvits, L. (author), Paragi, Zsolt (author), An, Tao (author), Zhang, Yingkang (author), Cao, Hongmin (author), Sbarrato, Tullia (author)High-redshift radio sources provide plentiful opportunities for studying the formation and evolution of early galaxies and supermassive black holes. However, the number of known radio-loud active galactic nuclei (AGN) above redshift 4 is rather limited. At high redshifts, it appears that blazars, with relativistically beamed jets pointing...journal article 2022
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Gabányi, Krisztina (author), Frey, Sándor (author), An, Tao (author), Cao, Hongmin (author), Paragi, Zsolt (author), Gurvits, L. (author), Zhang, Yingkang (author), Sbarrato, Tullia (author), Krezinger, Máté (author)Less than 200 radio-loud active galactic nuclei are known above redshift 4. Around 40 of them have been observed at milliarcsecond (mas) scale resolution with very long baseline interferometry (VLBI) technique. Some of them are unresolved, compact, relativistically beamed objects, and blazars with jets pointing at small angles to the observer...journal article 2021