2008ApJ...673L.171R

Query : 2008ApJ...673L.171R

2008ApJ...673L.171R - Astrophys. J., 673, L171-L174 (2008/February-1)

Unstable disk accretion onto magnetized stars: first global three-dimensional magnetohydrodynamic simulations.

ROMANOVA M.M., KULKARNI A.K. and LOVELACE R.V.E.

Abstract (from CDS):

We report on the first global three-dimensional (3D) MHD simulations of disk accretion onto a rotating magnetized star through the Rayleigh-Taylor instability. The star has a dipole field misaligned relative to the rotation axis by a small angle Θ. Simulations show that, depending on the accretion rate, a star may be in the stable or unstable regime of accretion. In the unstable regime, matter penetrates deep into the magnetosphere through several elongated ``tongues'' which deposit matter at random places on the surface of the star, leading to stochastic light curves. In the stable regime, matter accretes in ordered funnel streams and the light curves are almost periodic. A star may switch between these two regimes depending on the accretion rate and may thus show alternate episodes of ordered pulsations and stochastic light curves. In the intermediate regime, both stochastic and ordered pulsations are observed. For Θ>30°, the instability is suppressed and stable accretion through funnel streams dominates.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Instabilities - Magnetohydrodynamics: MHD - Stars: 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 2MAXI J1900-248 LXB 19 00 08.65 -24 55 13.7     18.09     ~ 226 0

Query : 2008ApJ...673L.171R

Basic data :
2MAXI J1900-248 -- Low Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,2MAXI,...), LXB (2007ApJS), Psr (2007ApJS), N* (2014MNRAS), N*? (2007ApJS)
ICRS coord. (ep=J2000) : 		19 00 08.65 -24 55 13.7 [ ] D 2005ATel..526....1F
FK4 coord. (ep=B1950 eq=1950) : 		18 57 04.78 -24 59 27.3 [ ]
Gal coord. (ep=J2000) : 		011.30491 -12.87279 [ ]
Fluxes (1) :
V 18.09 [~] D 2007A&A...469..807L
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Identifiers (6) :
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HETE J1900.1-2455 PBC J1900.1-2454 SWIFT J1900.1-2453
2MAXI J1900-248 SWIFT J1900.2-2455 [KRL2007b] 349

References (226 between 1850 and 2026) (Total 226)
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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Distance : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 2MAXI J1900-248

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