Study on the magnetic field of the ultraluminous X-ray pulsar RX J0209.6-7427
arXiv:2505.20248 · doi:10.1016/j.jheap.2025.100429
Abstract
RX J0209.6-7427 is an ultraluminous X-ray pulsar (ULXP) having spin period of about 9.3 s. To date, no cyclotron resonance scattering features have been detected in this source, which can enable direct measurement of the magnetic field of the pulsar. We estimate the surface magnetic field of the neutron star in this source using different models and find that the inferred magnetic field lies in the range of G. We study the magnetic field and spin period evolution of the source using existing models and find that the magnetic field will decay to about G assuming steady accretion and the source will become a millisecond pulsar at the end of the accretion phase of the accreting binary. Comparison between the magnetic field and the spin period of other ULXPs with those of magnetars suggests that some ULXPs may have magnetar-like strong dipolar magnetic fields. Studying the magnetic and spin period evolution of ULXPs may be helpful for understanding magnetar evolution and the millisecond pulsar formation.
7 pages, 3 figures, accepted for publication in the Journal of High Energy Astrophysics
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
- The critical accretion luminosity for magnetized neutron stars
- The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-2
- Evolution of a buried magnetic field in the central compact object neutron stars
- The ultra luminous X-ray source NuSTAR J095551+6940.8: A magnetar in a high mass X-ray binary
- NuSTAR J095551+6940.8: a highly magnetised neutron star with super-Eddington mass accretion
- Insight-HXMT discovery of the highest energy CRSF from the first Galactic ultra-luminous X-ray pulsar Swift J0243.6+6124
- Study of Recent outburst in the Be/X-ray binary RX J0209.6-7427 with AstroSat: A new ultraluminous X-ray pulsar in the Magellanic Bridge?
- The 2019 super-Eddington outburst of RX J0209.6-7427: Detection of pulsations and constraints on the magnetic field strength
- An accreting low magnetic field magnetar for the ultraluminous X-ray source in M82
- Super-Eddington Emission from Accreting, Highly Magnetised Neutron Stars with a Multipolar Magnetic Field
- On the Magnetic Fields, Beaming Fractions, and Fastness Parameters of Pulsating Ultra-Luminous X-Ray Sources
- Simulating the shock dynamics of a neutron star accretion column
- Constraining the dipolar magnetic field of M82 X-2 by the accretion model
- Study on the magnetic field strength of NGC 300 ULX1
- Comparing the Super-Eddington accretion of SMC X-3 and RX J0209.6-7427 with Swift J0243.6+6124
- A major optical & X-ray outburst from the Magellanic Bridge source RX J0209.6-7427
- AstroSat observations of the Be/X-ray binary XTE J1946+274 during 2018 and 2021 outbursts
- Long-term spin-down and low luminosity regime in the Be/X-ray binary pulsar GX 304-1