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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 1.

The noise characteristics of the image background are close to Gaussian. The pixel-by-pixel distribution of normalized flux in the PSF-subtracted F444W image is shown here. Although the region near the star has residual speckles that are both strongly negative and positive (left- and rightmost bins in the dashed histogram show outlier pixels that are <−5σ and >5σ, respectively), the field more than 3″ from the star (solid line) is a close match to a normal distribution (dotted line), with relatively few candidates for new source detection.

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