Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
2021 | journal article. A publication with affiliation to the University of Göttingen.
Jump to: Cite & Linked | Documents & Media | Details | Version history
Cite this publication
Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
Lampón, M.; López-Puertas, M.; Czesla, S.; Sánchez-López, A.; Lara, L. M.; Salz, M. & Sanz-Forcada, J. et al. (2021)
Astronomy and Astrophysics, 648 pp. L7. DOI: https://doi.org/10.1051/0004-6361/202140423
Documents & Media
Details
- Authors
- Lampón, M.; López-Puertas, M.; Czesla, S.; Sánchez-López, A.; Lara, L. M.; Salz, M.; Sanz-Forcada, J.; Molaverdikhani, K.; Quirrenbach, A.; Ribas, I.
- Abstract
- Hydrodynamic escape is the most efficient atmospheric mechanism of planetary mass loss and has a large impact on planetary evolution. Three hydrodynamic escape regimes have been identified theoretically: energy-limited, recombination-limited, and photon-limited. However, no evidence of these regimes had been reported until now. Here, we report evidence of these three regimes via an analysis of a helium I triplet at 10 830 Å and Ly α absorption involving a 1D hydrodynamic model that allows us to estimate hydrogen recombination and advection rates. In particular, we show that HD 209458 b is in the energy-limited regime, HD 189733 b is in the recombination-limited regime, and GJ 3470 b is in the photon-limited regime. These exoplanets can be considered as benchmark cases for their respective regimes.
- Issue Date
- 2021
- Journal
- Astronomy and Astrophysics
- ISSN
- 0004-6361
- eISSN
- 1432-0746