2024ApJ...965...97M

Query : 2024ApJ...965...97M

2024ApJ...965...97M - Astrophys. J., 965, 97 (2024/April-2)

The Diffusion Limit of Photoevaporation in Primordial Planetary Atmospheres.

MODIRROUSTA-GALIAN D. and KORENAGA J.

Abstract (from CDS):

Photoevaporation is thought to play an important role in early planetary evolution. In this study, we investigate the diffusion limit of X-ray- and ultraviolet-induced photoevaporation in primordial atmospheres. We find that compositional fractionation resulting from mass loss is more significant than currently recognized, because it is controlled by the conditions at the top of the atmosphere, where particle collisions are less frequent. Such fractionation at the top of the atmosphere develops a compositional gradient that extends downward. The mass outflow eventually reaches a steady state in which the hydrogen loss is diffusion-limited. We derive new analytic expressions for the diffusion-limited mass-loss rate and the crossover mass.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Atmospheric dynamics - Atmospheric structure - Aeronomy

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME L 678-39b Pl 09 36 01.6372169407 -21 39 38.877606712           ~ 86 0

Query : 2024ApJ...965...97M

Basic data :
NAME L 678-39b -- Extra-solar Planet
Other object types: otypes_help 		PM* (), Pl (2019A&A), Pl? (TOI), * (GJ)
ICRS coord. (ep=J2000) : 		09 36 01.6372169407 -21 39 38.877606712 (Optical) [ 0.0189 0.0171 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		09 33 43.0024415372 -21 25 21.394873162 [ 0.0189 0.0171 90 ]
Gal coord. (ep=J2000) : 		253.8846594545382 +22.0829667262836 [ 0.0189 0.0171 90 ]
Proper motions mas/yr : 		138.722 -990.342 [0.023 0.020 90] A 2020yCat.1350....0G
Parallaxes (mas): 		105.9789 [0.0227] A 2020yCat.1350....0G
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Hierarchy : number of linked objects
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Identifiers (5) :
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GJ 357 b NAME L 678-39b TOI-562b
NAME LHS 2157 b TOI-562.01

References (86 between 1850 and 2026) (Total 86)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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GJ 357 b

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