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The James Webb Space Telescope NIRSpec-PRISM Transmission Spectrum of the Super-puff, Kepler-51d

  • Authors: Jessica E. Libby-Roberts, Aaron Bello-Arufe, Zachory K. Berta-Thompson, Caleb I. Cañas, Yayaati Chachan, Renyu Hu, Yui Kawashima, Catriona Murray, Kazumasa Ohno, Armen Tokadjian, Suvrath Mahadevan, Kento Masuda, Leslie Hebb, Caroline Morley, Guangwei Fu, Peter Gao, Kevin B. Stevenson

Jessica E. Libby-Roberts et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 12.

Top panel: plot of the out of transit stellar flux density along with the best-fit models from four different model assumptions. The dark- and light-red lines are from models fitting for the overall reddening, while the dark-blue points are from the model with no reddening but spot temperature fit. The light-blue line shows a model holding spot temperature and reddening constant to the values derived from the spot crossing and dustmaps, respectively. Bottom panel: the residuals color-coded based on their respective models. None of the spectral models are able to reproduce the scatter at wavelengths <3 μm, while all fit the longer wavelengths well.

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