Retention of Habitable Atmospheres in Planetary Systems
David Brain
(1)
,
Zachory Berta-Thompson
(2)
,
Michael Chaffin
(1)
,
Jean-Yves Chaufray
(3)
,
Ofer Cohen
(4)
,
Thomas Cravens
(5)
,
Kevin France
(6)
,
Yoshifumi Futaana
(7)
,
Katherine Garcia-Sage
(8)
,
Alex Glocer
(8)
,
Mats Holmstrom
(7)
,
Riku Jarvinen
(9)
,
Lynn Kistler
(10)
,
Ravikumar Kopparapu
(8)
,
François Leblanc
(11)
,
Yingjuan Ma
(12)
,
Dan Marsh
(13)
,
Aimee Merkel
(1)
,
Rachel Osten
(14)
,
William Peterson
(1)
,
Laura Peticolas
(15)
,
Robin Ramstad
(1)
,
Shotaro Sakai
(16)
,
Kanako Seki
(17)
,
Kevin Stevenson
(18)
,
Robert Strangeway
(12)
,
Naoki Terada
(19)
,
Aline Vidotto
(20)
1
LASP -
Laboratory for Atmospheric and Space Physics [Boulder]
2 Department of Astrophysical and Planetary Sciences [Boulder]
3 PLANETO - LATMOS
4 UMass Lowell - University of Massachusetts [Lowell]
5 KU - University of Kansas [Lawrence]
6 University of Colorado [Boulder]
7 IRF - Swedish Institute of Space Physics [Kiruna]
8 GSFC - NASA Goddard Space Flight Center
9 FMI - Finnish Meteorological Institute
10 UNH - University of New Hampshire
11 HELIOS - LATMOS
12 IGPP - Institute of Geophysics and Planetary Physics [Los Angeles]
13 University of Leeds
14 LAM - Laboratoire d'Astrophysique de Marseille
15 Sonoma State University [Rohnert Park]
16 Department of Geophysics [Sendai]
17 UTokyo - The University of Tokyo
18 APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD]
19 Graduate School of Information Sciences [Sendai]
20 Universiteit Leiden = Leiden University
2 Department of Astrophysical and Planetary Sciences [Boulder]
3 PLANETO - LATMOS
4 UMass Lowell - University of Massachusetts [Lowell]
5 KU - University of Kansas [Lawrence]
6 University of Colorado [Boulder]
7 IRF - Swedish Institute of Space Physics [Kiruna]
8 GSFC - NASA Goddard Space Flight Center
9 FMI - Finnish Meteorological Institute
10 UNH - University of New Hampshire
11 HELIOS - LATMOS
12 IGPP - Institute of Geophysics and Planetary Physics [Los Angeles]
13 University of Leeds
14 LAM - Laboratoire d'Astrophysique de Marseille
15 Sonoma State University [Rohnert Park]
16 Department of Geophysics [Sendai]
17 UTokyo - The University of Tokyo
18 APL - Johns Hopkins University Applied Physics Laboratory [Laurel, MD]
19 Graduate School of Information Sciences [Sendai]
20 Universiteit Leiden = Leiden University
Jean-Yves Chaufray
- Fonction : Auteur
- PersonId : 175063
- IdHAL : jean-yves-chaufray
- IdRef : 12289877X
François Leblanc
- Fonction : Auteur
- PersonId : 175354
- IdHAL : francois-leblanc69
- ORCID : 0000-0002-5548-3519
- IdRef : 223432296
Résumé
The ability of a planet to retain an atmosphere influences whether water can be stable as a liquid at the planet's surface. A planet's atmospheric state is the result of source, loss, and modification processes that have acted on the atmosphere over time. The loss of atmosphere to space is therefore an important component in assessing planetary surface habitability. 'Atmospheric escape' is a catch-all term that refers to distinct processes that provide sufficient energy to particles for escape to space. Escape processes include thermal escape, hydrodynamic escape, ion loss, photochemical escape, and sputtering. At present, scientists who study atmospheric escape processes at Earth, solar system planets, and exoplanets each employ different and often siloed strategies to estimate escape rates. This fractured approach has hindered development of a comprehensive understanding of how atmospheric escape works at any planet. Here we present an overview of a team science effort to estimate atmospheric escape rates for a wide variety of star-planet combinations. Our goal is to determine which regions within the parameter space of stellar and planetary properties relevant for atmospheric escape are most likely to result in planets that retain habitable atmospheres. Our effort consists of four objectives: (1) We will compute stellar EUV and wind inputs for atmospheric escape for an ensemble of star-planet scenarios; (2) We will improve and link models for atmospheric escape from any planet via each major escape process, validating them against observations; (3) We will construct a multi-dimensional end-to-end model library for atmospheric escape based on more than 200 star-planet combinations, making it publicly accessible via a web portal; and (4) We will apply the model library to understand the connection between atmospheric escape, habitability, and observations.