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High Resolution Speckle Imaging of Exoplanet Host Stars

The three NASA funded speckle instruments - NESSI at WIYN, 'Alopeke in Gemini North, and Zorro in Gemini South - provide simultaneous two-color, diffraction-limited imaging. All raw and fully reduced data are available, with no exclusive use period, at the NASA Exoplanet Science Archive.

High Resolution Speckle Imaging of Exoplanet Host Stars
Image Credit: International Gemini Observatory/NOIRLab/NSF/AURA/J. da Silva (Spaceengine)

Proper accounting of companion stars is crucial to validate and characterize transit discoveries. Without additional information about the multiplicity of the host star, the planet radii will be underestimated by a factor of 1.5 in average.