Fig. 3: Hotspot and ring-group spectra from Eigenspectra bracket the full dayside-integrated spectrum. | Nature Astronomy

Fig. 3: Hotspot and ring-group spectra from Eigenspectra bracket the full dayside-integrated spectrum.

From: Horizontal and vertical exoplanet thermal structure from a JWST spectroscopic eclipse map

Fig. 3: Hotspot and ring-group spectra from Eigenspectra bracket the full dayside-integrated spectrum.The alternative text for this image may have been generated using AI.

Black points with error bars (standard deviation; Methods) show the Eigenspectra emission spectra from the hotspot and ring groups, and yellow points show the hemispherically averaged homogeneous dayside emission spectrum3, binned in wavelength to match the group spectra. The spectra have been converted to brightness temperature by assuming blackbody emission for the planet in each bin and a PHOENIX emission model for the star. The HyDRA (purple) and Pyrat Bay (green) regions show 95.45% (2σ) credible regions from 1D atmospheric retrievals on each spectrum. Labels along the bottom show the wavelength ranges at which different atmospheric constituents create features in the spectrum. An average of the flux from the hotspot and ring regions produces a spectrum matching the dayside average (Extended Data Fig. 2). See Methods for further discussion of the ring spectrum and the mismatch with associated retrievals.

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