BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Source dynamics and evolution of low-luminosity FRII radio galaxie
 s - Dr. Bonny Barkus (University of Hertfordshire)
DTSTART:20240319T111500Z
DTEND:20240319T120000Z
UID:TALK213307@talks.cam.ac.uk
CONTACT:Charles Walker
DESCRIPTION:I will present new VLA observations that reveal the structure 
 of a new population of low-luminosity FRII radio galaxies discovered in Lo
 TSS. Fanaroff and Riley (1974) identified a luminosity break between their
  two morphological classes. FRIs are defined to be low-luminosity\, centre
  bright jets and the higher luminosity FRIIs have jets that are edge brigh
 tened and terminate in hotspots. Using LoTSS DR1\, Mingo et al (2019) demo
 nstrated an overlap in luminosity between FRI and FRII morphology rather t
 han a clear divide\, discovering a sub-sample of FRIIs with luminosities u
 p to 3 magnitudes lower than the typical FR break. A population of low-lum
 inosity FRIIs raises questions about their origins\; are they older\, fadi
 ng FRIIs\, or hosted by lower mass galaxies? Our new VLA observations of a
  sample of LoTSS-selected low-luminosity FRIIs allow us to make comparison
 s between the two FRII luminosity populations on the prevalence of hotspot
 s\, as well as morphological and spectral differences.
LOCATION:Coffee area\, Battcock Centre
END:VEVENT
END:VCALENDAR