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SUMMARY:Colloquium | Heather Cegla (University of Warwick | Coventry\, UK)
DTSTART:20260423T123000Z
DTEND:20260423T133000Z
DTSTAMP:20260419T220937Z
UID:www.aip.de-2350
CATEGORIES:Scientific
CATEGORIES:Scientific Talk
CATEGORIES:Public
CATEGORIES:Colloquium
CONTACT:Julián Alvarado-Gómez <julian.alvarado-gomez@aip.de>
DESCRIPTION:Speaker: Heather Cegla (University of Warwick | Coventry\, UK)
 \nTitle: Exploring the impact of stellar variability in high resolution sp
 ectroscopy through observations and simulations\nAbstract: High-precision\
 , high-resolution spectroscopy is a powerful tool for confirming and chara
 cterising exoplanets\, but variability on stellar surfaces can contaminate
  these measurements.  In this talk\, I will provide an overview of the wor
 k my group is performing in this area. I will show our most recent efforts
  studying granulation on Sun-like stars using 3D stellar atmosphere simula
 tions across a range of stellar lines in the optical. We also use spectros
 copic observations of transiting planets to spatially resolve stellar surf
 aces. I will share our analysis of the WASP-85 A system\, where we use the
  transiting planet to spatially resolve the surface and isolate the proper
 ties of an occulted starspot. Finally\, I will discuss our use of high-res
 olution cross-correlation spectroscopy to characterise exoplanet atmospher
 es and examine how stellar surface variability can bias these measurements
  through forward modelling.\nNote: Host: Katja Poppenhäger\n
LOCATION:AIP\; Kirch building\, Conference room
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