A Nondetection of Iron in the First High-resolution Emission Study of the Lava Planet 55 Cnc e
oleh: Kaitlin C. Rasmussen, Miles H. Currie, Celeste Hagee, Christiaan van Buchem, Matej Malik, Arjun B Savel, Matteo Brogi, Emily Rauscher, Victoria Meadows, Megan Mansfield, Eliza M.-R. Kempton, Jean-Michel Desert, Joost P. Wardenier, Lorenzo Pino, Michael Line, Vivien Parmentier, Andreas Seifahrt, David Kasper, Madison Brady, Jacob L. Bean
| Format: | Article |
|---|---|
| Diterbitkan: | IOP Publishing 2023-01-01 |
Deskripsi
Close-in lava planets represent an extreme example of terrestrial worlds, but their high temperatures may allow us to probe a diversity of crustal compositions. The brightest and most well-studied of these objects is 55 Cancri e, a nearby super-Earth with a remarkably short 17 hr orbit. However, despite numerous studies, debate remains about the existence and composition of its atmosphere. We present upper limits on the atmospheric pressure of 55 Cnc e derived from high-resolution time-series spectra taken with Gemini-N/MAROON-X. Our results are consistent with current crustal evaporation models for this planet which predict a thin ∼100 mbar atmosphere. We conclude that, if a mineral atmosphere is present on 55 Cnc e, the atmospheric pressure is below 100 mbar.