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SUMMARY:Fast and Furious? - Debris Discs in the beta Pic Moving Group - Ni
 cole Pawellek
DTSTART:20210901T123000Z
DTEND:20210901T130000Z
UID:TALK161707@talks.cam.ac.uk
CONTACT:Francisco Paz-C
DESCRIPTION:Only 20% of old field stars have detectable analogues to our A
 steroid and Kuiper belts which are called debris discs. This leaves open t
 he question of what disc\, if any\, is present around the remaining 80%. Y
 oung moving groups allow to probe this population\, since discs are expect
 ed to have been brighter early on. We consider the population of F stars i
 n the 23 Myr-old BPMG where we find that 9/12 targets possess discs and co
 mpare it to disc samples from ∼45 Myr and ∼150 Myr-old moving groups\,
  and to discs found around field stars. We find that the disc luminosities
  in the populations considered drop by two orders of magnitude within the 
 first 100 Myr. This is much faster than expected by collisional evolution!
  In this talk\, we investigate different scenarios that could explain the 
 fast evolution of the debris discs in the BPMG.
LOCATION: Webinar  (via Zoom online)
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