Transit mapping of a starspot on CoRoT-2

Link:
Autor/in:
Erscheinungsjahr:
2009
Medientyp:
Text
Schlagworte:
  • Planet
  • Planets
  • Planet candidates
  • Galaxies
  • Stars
  • Stars: imaging
  • Stars: individual: CoRoT-2
  • Stars: late-type
  • Stars: planetary systems
  • Stars: activity
  • Planet
  • Planets
  • Planet candidates
  • Galaxies
  • Stars
Beschreibung:
  • We analyze variations in the transit lightcurves of CoRoT-2b, a massive hot Jupiter orbiting a highly active G star. We use one transit lightcurve to eclipse-map a photospheric spot occulted by the planet. In this case study we determine the size and longitude of the eclipsed portion of the starspot and systematically study the corresponding uncertainties. We determine a spot radius between 4.5° and 10.5° on the stellar surface and the spot longitude with a precision of about ±1 degree. Given the well-known transit geometry of the CoRoT-2 system, this implies a reliable detection of spots on latitudes typically covered by sunspots; the size of the modelled spot is comparable to large spot groups on the Sun. We discuss the future potential of eclipse mapping by planetary transits for the high-resolution analysis of stellar surface features. © 2009 ESO.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH
Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/ce6c8192-3e38-4b1f-92fc-152b395d9b88