How James Webb's exoplanet measurements have been interpreted wrong

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Researchers found that models used to interpret the data need to be improved.

Not as accurate as previously assumed

"Currently, the model we use to decrypt spectral information is not up to par with the precision and quality of data we have from the James Webb telescope," adds EAPS graduate student Prajwal Niraula. "We need to up our game and tackle together the opacity problem." Based on their analysis, the team concluded that existing opacity models by the Webb telescope hit an "accuracy wall” where they weren’t sensitive enough to tell whether a planet has an atmospheric temperature of 300 Kelvin or 600 Kelvin, or whether a certain gas takes up 5 percent or 25 percent of an atmospheric layer.

Not all is lost, however. The team also found that every model produced a "good fit" with the data that generated a light spectrum from that chemical composition that was close enough to, or "fit" with the original spectrum.

 

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