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SUMMARY:Space VLBI Studies of the Blazars 3C 454.3 and OJ287 at 22 GHz wit
 h RadioAstron
DTSTART;VALUE=DATE-TIME:20240903T141500Z
DTEND;VALUE=DATE-TIME:20240903T143000Z
DTSTAMP;VALUE=DATE-TIME:20260306T153901Z
UID:indico-contribution-91@cern.ch
DESCRIPTION:Speakers: Dr. TRAIANOU\, Thalia (IAA-CSIC/MPIfR)\nIn 2016\, we
  conducted high-resolution VLBI observations of the blazars 3C 454.3 and O
 J287 at 22 GHz\, utilizing the space antenna RadioAstron simultaneously wi
 th nearly 30 ground-based antennas. These unique observations enabled us t
 o achieve an angular resolution of ~40 microarcseconds\, resulting in unpr
 ecedented detailed images of the blazars’ inner jet structures. The stud
 y of 3C 454.3 revealed intricate features in the innermost jet region\, in
 cluding extreme jet bending at ~0.6 mas radial distance from the VLBI core
  and several distinct jet features upstream of this bending. This jet morp
 hology is consistent with our quasi-simultaneous observations at 86 GHz wi
 th GMVA. Meanwhile\, the observations of OJ287\, a blazar well-known for i
 ts periodic optical outbursts believed to be triggered by a binary superma
 ssive black hole system at its center\, show a complex innermost jet struc
 ture\, significantly different from the 2014 RadioAstron observations. Joi
 n me as I present these new results and discuss their implications.\n\nhtt
 ps://events.mpifr-bonn.mpg.de/indico/event/371/session/9/contribution/91
LOCATION:CJD Bonn Castell
URL:https://events.mpifr-bonn.mpg.de/indico/event/371/session/9/contributi
 on/91
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