2010ApJ...719.1421P

Query : 2010ApJ...719.1421P

2010ApJ...719.1421P - Astrophys. J., 719, 1421-1426 (2010/August-3)

Magnetic drag on hot Jupiter atmospheric winds.

PERNA R., MENOU K. and RAUSCHER E.

Abstract (from CDS):

Hot Jupiters, with atmospheric temperatures T ≳ 1000 K, have residual thermal ionization levels sufficient for the interaction of ions with the planetary magnetic field to result in a sizable magnetic drag on the (neutral) atmospheric winds. We evaluate the magnitude of magnetic drag in a representative three-dimensional atmospheric model of the hot Jupiter HD 209458b and find that it is a plausible mechanism to limit wind speeds in this class of atmospheres. Magnetic drag has a strong geometrical dependence, both meridionally and from the dayside to the nightside (in the upper atmosphere), which could have interesting consequences for the atmospheric flow pattern. By extension, close-in eccentric planets with transiently heated atmospheres will experience time-variable levels of magnetic drag. A robust treatment of magnetic drag in circulation models for hot atmospheres may require iterated solutions to the magnetic induction and Saha equations as the hydrodynamic flow is evolved.

Abstract Copyright: ∼

Journal keyword(s): planets and satellites: atmospheres - planets and satellites: individual: HD 209458b - planets and satellites: magnetic fields

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 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 2037 1

Query : 2010ApJ...719.1421P

Basic data :
HD 209458b -- Extra-solar Planet
Other object types: otypes_help 		Pl? (), Pl (2000ApJ), * (HD)
ICRS coord. (ep=J2000) : 		22 03 10.7727465312 +18 53 03.549393384 (Optical) [ 0.0213 0.0227 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 00 48.0717927453 +18 38 32.219124290 [ 0.0213 0.0227 90 ]
Gal coord. (ep=J2000) : 		076.7533281569711 -28.5269056004135 [ 0.0213 0.0227 90 ]
Proper motions mas/yr : 		29.766 -17.976 [0.028 0.025 90] A 2020yCat.1350....0G
Parallaxes (mas): 		20.7694 [0.0266] A 2020yCat.1350....0G
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Hierarchy : number of linked objects
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HD 209458b NAME Osiris

References (2037 between 1850 and 2026) (Total 2037)
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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