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Constraining Atmospheric Composition from the Outflow: Helium Observations Reveal the Fundamental Properties of Two Planets Straddling the Radius Gap

  • Authors: Michael Zhang, Jacob L. Bean, David Wilson, Girish Duvvuri, Christian Schneider, Heather A. Knutson, Fei Dai, Karen A. Collins, Cristilyn N. Watkins, Richard P. Schwarz, Khalid Barkaoui, Avi Shporer, Keith Horne, Ramotholo Sefako, Felipe Murgas, Enric Palle

Michael Zhang et al 2025 The Astronomical Journal 169 .

  • Provider: AAS Journals

Caption: Figure 3.

Excess absorption as a function of time and wavelength in the stellar frame, for planets b (left) and c (center and right). The top and bottom white lines represent white-light ingress and egress, while the slanted red lines indicate the wavelengths of the helium triplet in the planetary frame. The data behind this figure are available in six ASCII data files. A Python script is provided to read these files and recreate the figure.

(The data used to create this figure are available in the online article.)

(The data used to create this figure are available.)

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