2004MNRAS.352.1381M

Query : 2004MNRAS.352.1381M

2004MNRAS.352.1381M - Mon. Not. R. Astron. Soc., 352, 1381-1389 (2004/August-3)

Differential rotation in weakly magnetized neutron star atmospheres.

MENOU K.

Abstract (from CDS):

The atmospheres of weakly magnetized neutron stars expand hydrostatically and rotate differentially during thermonuclear X-ray bursts. Differential rotation is probably related to the frequency drifts of millisecond-burst oscillations exhibited by about a dozen nuclear-powered X-ray pulsars. Here, we analyse the linear stability of this differential rotation with respect to local, axisymmetric, multidiffusive MHD perturbations, at various heights in the neutron star atmosphere. Unstable magnetorotational modes are identified from within to well above the burning layers. Properties of the fastest growing modes depend sensitively on the local magnetic field geometry. Linear estimates suggest that momentum transport due to magnetorotational instabilities can affect atmospheric rotation profiles on time-scales relevant to burst oscillations. This transport would likely strengthen the coherence of burst oscillations and contribute to their drifts.

Abstract Copyright: 2004 RAS

Journal keyword(s): instabilities - MHD - turbulence - stars: neutron - stars: rotation - X-rays: bursts

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 SAX J1808.6-3658 X 18 08.6 -36 58           ~ 7 0

Query : 2004MNRAS.352.1381M

Basic data :
SAX J1808.6-3658 -- X-ray Source
Other object types: otypes_help 		X (SAX)
ICRS coord. (ep=J2000) : 		18 08 36.0 -36 58 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		18 05 11.9 -36 58 30 [ ]
Gal coord. (ep=J2000) : 		355.4093 -08.1674 [ ]
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SAX J1808.6-3658

References (7 between 1850 and 2026) (Total 7)
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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