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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-8504
DTSTART:20231130T213000Z
DTEND:20231130T223000Z
DTSTAMP:20260414T044419Z
LAST-MODIFIED:20231113T211313Z
LOCATION:4421 Sterling Hall
SUMMARY:Studying the Evolution of Radio Galaxies With the VLA Sky Surv
 ey\, Astronomy Colloquium\, Yjan Gordon\, UW-Madison
DESCRIPTION:Active Galactic Nuclei (AGN) are a key phase of galaxy of 
 evolution\, and understanding the AGN duty cycle is essential for comp
 rehending the mechanisms that drive and regulate galaxy growth. Radio 
 galaxies in particular are well suited to studying the evolution of AG
 N as the properties of the radio jets can allow for estimates of the a
 ge of the AGN. An effective way of studying large numbers of these obj
 ects is to use blind surveys of wide areas of the sky. One of the late
 st such projects\, the Very Large Array Sky Survey (VLASS)\, is curren
 tly mapping >80% of the sky with the highest frequency (3GHz) and angu
 lar resolution (3'') of any near-all-sky radio survey to date. In this
  talk I will discuss the latest efforts with VLASS to identify radio-l
 oud AGN at various stages of their evolution. In particular\, the high
  resolution of VLASS is especially well suited to identifying compact 
 radio galaxies\, including young AGN that have recently been triggered
 . By investigating the host galaxies of young radio-loud AGN\, we find
  that high levels of star formation are associated with the most compa
 ct radio jets\, and I discuss the likely mechanisms driving this resul
 t. Finally\, I consider some of the lessons learned from the early VLA
 SS data\, and directions moving forward into the era of the ngVLA and 
 SKA.
URL:https://www.physics.wisc.edu/events/?id=8504
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