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Leveraging Impact Parameter to Mitigate the Transit Light Source Effect: Early Insights from TRAPPIST-1

  • Authors: Ana Glidden, Alexander I. Shapiro, Sara Seager, Nadiia Kostogryz, Valeriy Vasilyev, Roeland P. van der Marel, J. de Wit, Benjamin V. Rackham, Prajwal Niraula, Natalie H. Allen, Jingcheng Huang, Nikole K. Lewis, Zifan Lin, Jacob Lustig-Yaeger, Ryan J. MacDonald, Brett M. Morris, Elijah Mullens, Kevin B. Stevenson, Jeff A. Valenti, Daniel Valentine, Hannah R. Wakeford, C. Matt Mountain

Ana Glidden et al 2026 The Astrophysical Journal Letters 1008 .

  • Provider: AAS Journals

Caption: Figure 5.

Visit-to-visit variability of TRAPPIST-1 e transmission spectra compared with TLS-effect models for a hot, cold, and mixed active region along with a representative Earth-like terrestrial atmosphere model (dark green). While none of the models fit the data across all wavelengths, some trends can be seen. For example, Visit 3, which has a midtransit flare, shows broadly more agreement with the hotter models compared with the quieter first two visits, in particular between 3 and 4.5 μm.

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