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Deep Limits on Planets Exterior to HR 8799’s Known Planetary System with the James Webb Space Telescope

  • Authors: Bryden Geoffrey, Llop-Sayson Jorge, Beichman Charles A., Balmer William O., Kammerer Jens, Leisenring Jarron M., Ygouf Marie, Krist John, Faramaz-Gorka Virginie, Greenbaum Alexandra Z., Girard Julien, Perrin Marshall, Pueyo Laurent, van der Marel Roeland, Meyer Michael, Johnstone Doug, Hodapp Klaus, Rieke Marcia

Bryden Geoffrey et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 3.

JWST/NIRCam F444W image with color stretch optimized to emphasize the planets. While planets b, c, and d stand out in the initial postprocessed image (left), planet e is not readily apparent. This is partly due to its relative faintness (86% of its light is blocked by the coronagraph mask), but also because of contamination from the complex PSFs of the other planets (see Figures 4 and 5 for examples of PSFs). Once the PSFs of b, c, and d are subtracted from the image (right), planet e becomes prominent. The white dashed ellipse in each frame corresponds to an orbital radius of 100 au, inclined to match the disk orientation.

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