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| Paper: |
Do Accreting Magnetars Exist? The Case of 4U 2206+54 |
| Volume: |
466, Electromagnetic Radiation from Pulsars and Magnetars |
| Page: |
25 |
| Authors: |
Reig, P. |
| Abstract: |
The discovery of very slow pulsations (5560s) has solved the long-standing
issue of the nature of the compact object in the high-mass X-ray binary 4U
2206+54 but has posed new questions. According to spin evolutionary models
in close binary systems and the theory of quasispherical accretion in X-ray
pulsars, such slow pulsations require a neutron star magnetic field
strength larger that the quantum critical value suggesting the presence of
a magnetar. The discovery of pulsations allows us to estimate the magnetic
field strength of the neutron star. In this work I show that the observed
long-term spin-down evolution of 4U 2206+54 agrees with the magnetar
scenario. |
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