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TOI-3757 b: A Low-density Gas Giant Orbiting a Solar-metallicity M Dwarf

  • Authors: Shubham Kanodia, Jessica Libby-Roberts, Caleb I. Cañas, Joe P. Ninan, Suvrath Mahadevan, Gudmundur Stefansson, Andrea S. J. Lin, Sinclaire Jones, Andrew Monson, Brock A. Parker, Henry A. Kobulnicky, Tera N. Swaby, Luke Powers, Corey Beard, Chad F. Bender, Cullen H. Blake, William D. Cochran, Jiayin Dong, Scott A. Diddams, Connor Fredrick, Arvind F. Gupta, Samuel Halverson, Fred Hearty, Sarah E. Logsdon, Andrew J. Metcalf, Michael W. McElwain, Caroline Morley, Jayadev Rajagopal, Lawrence W. Ramsey, Paul Robertson, Arpita Roy, Christian Schwab, Ryan C. Terrien, John Wisniewski, Jason T. Wright

Shubham Kanodia et al 2022 The Astronomical Journal 164 .

  • Provider: AAS Journals

Caption: Figure 12.

We create a simulated JWST/NIRSpec-Prism transmission spectrum of TOI-3757 b (assuming a single transit) using uncertainties calculated with PandExo (Batalha et al. 2017) assuming an aerosol-free 10×solar-metallicity atmosphere model (blue) generated using Exo-Transmit (Kempton et al. 2017). We also plot the same underlying composition model plus an opaque aerosol layer at 1 mbars (green) and 0.1 mbars (orange) for comparison. We assume these aerosols to be gray absorbers (i.e., no wavelength-dependent absorption features). Based on PandExo simulations, we find that even with a high-altitude aerosol layer of 0.1 mbars, we should still detect water, methane, and carbon dioxide present in TOI-3757 b’s atmosphere with JWST at ∼ 9σ compared to a featureless flat spectrum.

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