TY - JOUR
T1 - A small radio galaxy at z = 4.026
AU - Gabányi, Krisztina
AU - Frey, Sándor
AU - An, Tao
AU - Cao, Hongmin
AU - Paragi, Zsolt
AU - Gurvits, Leonid I.
AU - Zhang, Yingkang
AU - Sbarrato, Tullia
AU - Krezinger, Máté
AU - More Authors, null
PY - 2021
Y1 - 2021
N2 - 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's line of sight. But there are also objects with no sign of relativistic beaming possibly having larger jet inclination angles. In a couple of cases, X-ray observations indicate the presence of relativistic beaming contrary to the VLBI measurements made with the European VLBI Network. J1420+1205 is a prominent example, where our 30–100 mas-scale enhanced multi element remotely linked interferometer network radio observations revealed a rich structure reminiscent of a small radio galaxy. It shows a bright hotspot that might be related to the denser interstellar medium around a young galaxy at an early cosmological epoch.
AB - 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's line of sight. But there are also objects with no sign of relativistic beaming possibly having larger jet inclination angles. In a couple of cases, X-ray observations indicate the presence of relativistic beaming contrary to the VLBI measurements made with the European VLBI Network. J1420+1205 is a prominent example, where our 30–100 mas-scale enhanced multi element remotely linked interferometer network radio observations revealed a rich structure reminiscent of a small radio galaxy. It shows a bright hotspot that might be related to the denser interstellar medium around a young galaxy at an early cosmological epoch.
KW - galaxies: active
KW - galaxies: high-redshift
KW - galaxies: individual: J1420+1205
KW - radio continuum: galaxies
UR - http://www.scopus.com/inward/record.url?scp=85118460108&partnerID=8YFLogxK
U2 - 10.1002/asna.20210057
DO - 10.1002/asna.20210057
M3 - Article
AN - SCOPUS:85118460108
SN - 0004-6337
VL - 342
SP - 1092
EP - 1096
JO - Astronomische Nachrichten
JF - Astronomische Nachrichten
IS - 9-10
ER -