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Heat Reveals What Clouds Conceal: Global Carbon and Longitudinally Asymmetric Chemistry on LTT 9779 b

  • Authors: Reza Ashtari, Sean Collins, Jared Splinter, Kevin B. Stevenson, Vivien Parmentier, Jonathan Brande, Suman Saha, Sarah Stamer, Ian J. M. Crossfield, James S. Jenkins, K. Angelique Kahle, Joshua D. Lothringer, Nishil Mehta, Nicolas B. Cowan, Diana Dragomir, Laura Kreidberg, Mercedes López-Morales, Thomas M. Evans-Soma, Emma Esparza-Borges, Megan Weiner Mansfield, Hayley Beltz, Tansu Daylan, Olivia Venot, Jason Pero, Xi Zhang

Reza Ashtari et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 5.

Captured flux fraction estimates of LTT 9779 b assuming blackbody emission. The red and blue boxes show the calculated effective temperature range of the planet using NIRSpec and NIRSpec+NIRISS, respectively. Using the same formulation as J. Splinter et al. (2025), we estimate the captured flux fraction as the ratio of an instrument’s band-integrated blackbody emission to the planet’s bolometric emission. Black dashed lines indicate the captured flux fraction boundaries within the effective temperatures. NIRSpec/G395H captures ∼16%–38% of the bolometric flux, while the combination of NIRSpec and NIRISS captures ∼71%–93% of the bolometric flux.

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