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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20230425T123000
DTEND;TZID=Atlantic/Canary:20230425T133000
UID:iactalks-1681
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1681
CREATED:2023-04-25T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Understanding AGN jets through the analysis of blazar multiwaveleng
 th variability
DESCRIPTION:Understanding AGN jets through the analysis of blazar multiwave
 length variability\nDr. Claudia Raiteri\n\nActive galactic nuclei (AGN) ar
 e the most luminous persistent sources in the universe. A minority of AGN 
 are characterised by powerful plasma jets extending from close to the supe
 rmassive black hole at the centre of their host galaxy up to megaparsec sc
 ales in the intergalactic space. Inside these jets, charged particles are 
 accelerated to relativistic speeds and emit non-thermal radiation. In blaz
 ars one jet is oriented at a small angle with respect to the line of sight
 , and this causes Doppler beaming of the jet emission, with consequent flu
 x enhancement, and decrease of the variability time scales. The dominant c
 ontribution of the jet radiation to the blazar emission makes these object
 s ideal sources to investigate what happens in the inner regions of AGN je
 ts and even what is the jet structure and dynamics. We have been studying 
 blazar variability for more than 20 years in the framework of the Whole Bl
 azar Telescope (WEBT) Collaboration, including many tens of astronomers ob
 serving mainly in the optical, but also in the radio and near-infrared ban
 ds. The analysis of the wealth of multiwavelength data gathered during the
  WEBT monitoring campaigns, with unique time resolution in the optical ban
 d, allowed us to outline a model for the blazar variability, involving an 
 inhomogeneous twisting jet. In the final part of the seminar we will 
 mention the contribution to blazar understanding that is expected from Ver
 a C. Rubin Observatory’s Legacy Survey of Space and Time.
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