Ultraluminous X-ray pulsar: accreting magnetar?

Abstract

Magnetars are a special kind of neutron stars. There may also be accreting magnetars. From the studies of isolated magnetars, it is known that a neutron star with a strong dipole field only is not a magnetar. Super-slow X-ray pulsars may just be accreting high magnetic field neutron stars. The ultra-luminous X-ray pulsar NuSTAR J095551+6940.8 may be an accreting magnetar. It may be an accreting low magnetic field magnetar with multipole field of 10^14 G and dipole field of 10^12 G. This point of view is consistent with the study of isolated magnetars. An ultra-luminous X-ray pulsar phase in the binary evolution may result in massive millisecond pulsars.

5 pages, 1 figure. submitted to the proceeding of SMFNS2015

References in corpus (6)

• Magnetars: Properties, Origin and Evolution
• On the maximum accretion luminosity of magnetized neutron stars: connecting X-ray pulsars and ultraluminous X-ray sources
• Propeller effect in action in the ultraluminous accreting magnetar M82 X-2
• Nature of the Extreme Ultraluminous X-ray Sources
• Pulsar braking: magnetodipole vs. wind
• Massive Pulsars and Ultraluminous X-ray Sources