2010A&A...518A..19Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET01:48:35

2010A&A...518A..19Z - Astronomy and Astrophysics, volume 518, A19-19 (2010/7-2)

A diagnosis of torque reversals in 4U 1626-67.

ZHANG Z. and LI X.-D.

Abstract (from CDS):

Several X-ray pulsars have been observed to experience torque reversals, which provide important observational clues to the interaction between the neutron star magnetic field and the accretion disk. We review the current models proposed for the torque reversals and discuss their viability based on the observations of the quasi-periodic oscillations (QPOs) in 4U 1626-67. Most of these models seem to be incompatible with the evolution of the QPO frequencies if they are interpreted in terms of the beat frequency model. We suggest that winds or outflows from the neutron star and the accretion disk may play an important role in accounting for the spin-down in disk-fed neutron stars.

Abstract Copyright:

Journal keyword(s): accretion, accretion disk - stars: neutron - X-rays: binaries - X-rays: individual: 4U 1626-67 - X-rays: stars

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V779 Cen HXB 11 21 15.0920367078 -60 37 25.627505233   14.4       O9III/Veq 999 0
2 V* KZ TrA LXB 16 32 16.79 -67 27 39.3 17.40 18.60 18.5     ~ 528 1
3 V* HZ Her LXB 16 57 49.8110797681 +35 20 32.487435684 11.90 14.89 13.63 13.88   B3/6ep 1933 0
4 NAME OAO 1657-41 HXB 17 00 48.884 -41 39 21.46           Ofpe/WN9 211 0
5 V* V2116 Oph Sy* 17 32 02.1544831482 -24 44 44.125962969   20.78 18.4     M6IIIe 647 1
6 4U 1907+09 HXB 19 09 37.9 +09 49 49   19.41 16.35 14.40 12.53 O8.5Iab 309 1

    Equat.    Gal    SGal    Ecl

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2020.11.28-01:48:35

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