2020ApJ...892L..33J

Query : 2020ApJ...892L..33J

2020ApJ...892L..33J - Astrophys. J., 892, L33-L33 (2020/April-1)

Earth's polar night boundary layer as an analog for dark side inversions on synchronously rotating terrestrial exoplanets.

JOSHI M.M., ELVIDGE A.D., WORDSWORTH R. and SERGEEV D.

Abstract (from CDS):

A key factor in determining the potential habitability of synchronously rotating planets is the strength of the atmospheric boundary layer inversion between the dark side surface and the free atmosphere. Here we analyze data obtained from polar night measurements at the South Pole and Alert Canada, which are the closest analogs on Earth to conditions on the dark sides of synchronously rotating exoplanets without and with a maritime influence, respectively. On Earth, such inversions rarely exceed 30 K in strength, because of the effect of turbulent mixing induced by phenomena such as so-called "mesoscale slope winds," which have horizontal scales of 10-100 s of km, suggesting a similar constraint to near-surface dark side inversions. We discuss the sensitivity of inversion strength to factors such as orography and the global-scale circulation, and compare them to a simulation of the planet Proxima Centauri b. Our results demonstrate the importance of comparisons with Earth data in exoplanet research, and highlight the need for further studies of the exoplanet atmospheric collapse problem using mesoscale and eddy-resolving models.

Journal keyword(s): Exoplanets - Habitable planets - Atmospheric science - Exoplanet atmospheres - Exoplanet atmospheric variability - Planetary boundary layers - Planetary atmospheres - Exoplanet surface variability - Land-atmosphere interactions - Exoplanet surface characteristics - Exoplanet atmospheric composition

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 Proxima Centauri b	Pl	14 29 42.9461331854	-62 40 46.164680672						~	445	0

Query : 2020ApJ...892L..33J

Basic data :

NAME Proxima Centauri b -- Extra-solar Planet
Other object types:	`Pl ()`, `Pl? (2016Natur)`
ICRS coord. (ep=J2000) :	`14 29 42.9461331854 -62 40 46.164680672 (Optical) [ 0.0240 0.0344 90 ] A 2020yCat.1350....0G`
FK4 coord. (ep=B1950 eq=1950) :	`14 26 19.0268340676 -62 28 04.407284503 [ 0.0240 0.0344 90 ]`
Gal coord. (ep=J2000) :	`313.9398620493784 -01.9271491330428 [ 0.0240 0.0344 90 ]`
Proper motions mas/yr :	`-3781.741 769.465 [0.031 0.051 90] A` `2020yCat.1350....0G`
Parallaxes (mas):	`768.0665 [0.0499] A` `2020yCat.1350....0G`

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NAME Proxima b NAME Proxima Centauri b NAME Proxima Cen b

References (445 between 1850 and 2026) (Total 445)
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