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SUMMARY:GAUCHO: Searching for Planets Around the Coolest Stars in the Gala
 xy
DTSTART;VALUE=DATE-TIME:20261028T171500Z
DTEND;VALUE=DATE-TIME:20261028T172500Z
DTSTAMP;VALUE=DATE-TIME:20261028T125611Z
UID:indico-contribution-3659@nyx.physics.mcgill.ca
DESCRIPTION:Speakers: Flavie Bélanger (UdeM/IREx)\nUltra-cool dwarfs are 
 the smallest and coolest stars on the main sequence. While M dwarfs are ge
 nerally known to harbour a large number of planets\, including rocky\, Ear
 th-mass exoplanets\, the occurrence rate and architectures of planetary sy
 stems around ultra-cool dwarfs remain poorly constrained. To date\, the on
 ly well-characterized planetary system around an ultra-cool dwarf is the T
 RAPPIST-1 system. This regime is the last to be constrained by radial-velo
 city studies. The Grasping exoplanet Architectures of Ultra-Cool HOsts (GA
 UCHO) project is a blind radial velocity survey of about 15 ultra-cool dwa
 rfs with the NIRPS high-resolution spectrograph. In the long term\, GAUCHO
  aims to constrain the occurrence rate of systems like TRAPPIST-1 and supe
 r-Earths around ultra-cool dwarfs\, map typical long-orbit architectures (
 >10 days) of ultra-cool dwarf systems\, and measure their fraction of brow
 n-dwarf companions. Here\, we give an overview of the GAUCHO target sample
  and present preliminary results focusing on target selection for prolonge
 d observations within the NIRPS GTO program. These results highlight the s
 ignificant challenges associated with blind radial velocity searches of fa
 int targets.\n\nhttps://nyx.physics.mcgill.ca/event/587/contributions/3659
 /
LOCATION:Online 
URL:https://nyx.physics.mcgill.ca/event/587/contributions/3659/
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