Ultraslow PSR J0901-4046 with an ultrahigh magnetic field of $3.2\times 10^{16}$ G

Abstract

The recent discovery of a radio-emitting neutron star with an ultralong spin period of 76 s, PSR J0901-4046, raises a fundamental question on how such a slowly rotating magnetized object can be active in the radio band. A canonical magnetic field of $1.3\times 10^{14}$ G estimated from the pulsar period and its time derivative is wholly insufficient for PSR J0901-4046 to operate. Consideration of a magnetic inclination angle of $10^{\circ }$ estimated from the pulse width gives a higher magnetic field of $1.5\times 10^{15}$ G, which is still an order of magnitude lower than the necessary minimum of $2.5\times 10^{16}$ G following from the death line for radio pulsars with magnetic fields exceeding the critical value $4.4\times 10^{13}$ G. We show that if the observed microstructure of single pulses reflects relativistic beaming, the inferred surface magnetic field appears to be $3.2\times 10^{16}$ G, and without this assumption it is no less than $2.7\times 10^{16}$ G, which explains the existence of radio emission from PSR J0901-4046. This estimation makes PSR J0901-4046 a radio pulsar with the strongest magnetic field known and is a sign that PSR J0901-4046 slows down not by magnetic-dipole radiation, but rather by an electric current of 56 MA, when rotational energy is expended in accelerating charged particles over the polar cap.

6 pages

References in corpus (19)

• Transient pulsed radio emission from a magnetar
• 1E 1547.0-5408: a radio-emitting magnetar with a rotation period of 2 seconds
• Time-dependent pair cascades in magnetospheres of neutron stars I. Dynamics of the polar cap cascade with no particle supply from the neutron star surface
• Discovery of a radio emitting neutron star with an ultra-long spin period of 76 seconds
• Possible Evidence for Free Precession of a Strongly Magnetized Neutron Star in the Magnetar 4U 0142+61
• Accretion to Stars with Non-dipole Magnetic Fields
• The Multipolar Magnetic Field of Millisecond Pulsar PSR J0030+0451
• Meterwavelength Single-pulse Polarimetric Emission Survey
• Quasi-periodic oscillations of the X-ray burst from the magnetar SGR J1935+2154 and associated with the fast radio burst FRB 200428
• Post fall-back evolution of multipolar magnetic fields and radio pulsar activation
• A Single spark model for PSR J2144$-$3933
• Dependence of pulsar death line on the equation of state
• Detection of polarized quasi-periodic microstructure emission in millisecond pulsars
• A NuSTAR confirmation of the 36 ks hard X-ray pulse-phase modulation in the magnetar 1E 1547.0$-$5408
• Discovery of 40.5 ks Hard X-ray Pulse-Phase Modulations from SGR 1900+14
• A broadband radio study of PSR J0250+5854: the slowest-spinning radio pulsar known
• Jet in jet in M87
• Extinct radio pulsars as a source of subrelativistic positrons
• Tangled magnetic field model of QPOs

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