On the magnetic field of the ultraluminous X-ray pulsar M82 X-2
arXiv:1704.00171 · doi:10.3847/1538-4357/aa65d5
Abstract
The discovery of the ultraluminous X-ray pulsar M82 X-2 has stimulated lively discussion on the nature of the accreting neutron star. In most of the previous studies the magnetic field of the neutron star was derived from the observed spin-up/down rates based on the standard thin, magnetized accretion disk model. However, under super-Eddington accretion the inner part of the accretion disk becomes geometrically thick. In this work we consider both radiation feedback from the neutron star and the sub-Keplerian rotation in a thick disk, and calculate the magnetic moment - mass accretion rate relations for the measured rates of spin change. We find that the derived neutron star's dipole magnetic field depends the maximum accretion rate adopted, but is likely G. The predicted accretion rate change can be used to test the proposed models by comparison with observations.
ApJ, 838, 98 (2017)
References in corpus (22)
- An Ultraluminous X-ray Source Powered by An Accreting Neutron Star
- An accreting pulsar with extreme properties drives an ultraluminous x-ray source in NGC 5907
- Discovery of a 0.42-s pulsar in the ultraluminous X-ray source NGC 7793 P13
- Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13
- Masses, Beaming and Eddington Ratios in Ultraluminous X-ray Sources
- X-ray observations of ultraluminous X-ray sources
- ULXs: Neutron Stars vs Black Holes
- The ultra luminous X-ray source NuSTAR J095551+6940.8: A magnetar in a high mass X-ray binary
- A 62 Day X-Ray Periodicity and an X-Ray Flare from the Ultraluminous X-Ray Source in M82
- Optically thick envelopes around ULXs powered by accreating neutron stars
- NuSTAR J095551+6940.8: a highly magnetised neutron star with super-Eddington mass accretion
- An ultraluminous nascent millisecond pulsar
- Discovery of mHz X-ray Oscillations in a Transient Ultraluminous X-ray Source in M82
- A Population of Ultraluminous X-ray Sources with An Accreting Neutron Star
- On the Formation of Ultraluminous X-ray Sources with Neutron Star Accretors: the Case of M82 X-2
- The Effect of Transient Accretion on the Spin-Up of Millisecond Pulsars
- A radiation-hydrodynamic model of accretion columns for ultra-luminous X-ray pulsars
- Radiation Pressure-supported Accretion Disks: Vertical Structure, Energy Advection, and Convective Stability
- The Ultraluminous X-ray Sources near the Center of M82
- An accreting low magnetic field magnetar for the ultraluminous X-ray source in M82
- The accretion regimes of a highly magnetised NS: the unique case of NuSTAR J095551+6940.8
- Constraining the dipolar magnetic field of M82 X-2 by the accretion model
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- A Population of Neutron Star Ultraluminous X-ray Sources with A Helium Star Companion
- Accreting magnetars: linking ultraluminous X-ray pulsars and the slow pulsation X-ray pulsars
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