Anisotropic neutrino effect on magnetar spin: constraint on inner toroidal field
arXiv:1407.4653 · doi:10.1093/mnras/stu1442
Abstract
The ultra-strong magnetic field of magnetars modifies the neutrino cross section due to the parity violation of the weak interaction and can induce asymmetric propagation of neutrinos. Such an anisotropic neutrino radiation transfers not only the linear momentum of a neutron star but also the angular momentum, if a strong toroidal field is embedded inside the stellar interior. As such, the hidden toroidal field implied by recent observations potentially affects the rotational spin evolution of new-born magnetars. We analytically solve the transport equation for neutrinos and evaluate the degree of anisotropy that causes the magnetar to spin-up or spin-down during the early neutrino cooling phase. Supposing that after the neutrino cooling phase the dominant process causing the magnetar spin-down is the canonical magnetic dipole radiation, we compare the solution with the observed present rotational periods of anomalous X-ray pulsars 1E 1841-045 and 1E 2259+586, whose poloidal (dipole) fields are G and G, respectively. Combining with the supernova remnant age associated with these magnetars, the present evaluation implies a rough constraint of global (average) toroidal field strength at G.
arXiv comment9 pages, 4 figures, 1 table; accepted for publication in MNRAS
References in corpus (28)
- Explosion Mechanisms of Core-Collapse Supernovae
- The McGill Magnetar Catalog
- Protoneutron star evolution and the neutrino driven wind in general relativistic neutrino radiation hydrodynamics simulations
- Unifying the observational diversity of isolated neutron stars via magneto-thermal evolution models
- Magnetar Spindown, Hyper-Energetic Supernovae, and Gamma Ray Bursts
- A low-magnetic-field Soft Gamma Repeater
- Conditions for Shock Revival by Neutrino Heating in Core-Collapse Supernovae
- A variable absorption feature in the X-ray spectrum of a magnetar
- A highly resistive layer within the crust of X-ray pulsars limits their spin periods
- A new low magnetic field magnetar: the 2011 outburst of Swift J1822.3-1606
- Period clustering of the Anomalous X-ray Pulsars and magnetic field decay in magnetars
- Possible Evidence for Free Precession of a Strongly Magnetized Neutron Star in the Magnetar 4U 0142+61
- Neutrino-Nucleon Interactions in Magnetized Neutron-Star Matter: The Effects of Parity Violation
- On the Importance of the Equation of State for the Neutrino-Driven Supernova Explosion Mechanism
- Broad-band study with Suzaku of the magnetar class
- Can Parity Violation in Neutrino Transport Lead to Pulsar Kicks?
- The Distance and Age of the SNR Kes 73 and AXP 1E 1841-045
- An X-Ray Study of Supernova Remnant N49 and Soft Gamma-Ray Repeater 0526-66 in the Large Magellanic Cloud
- Magnetic field decay in neutron stars: from Soft Gamma Repeaters to "weak field magnetars"
- VLA and XMM-Newton observations of the SNR W41/TeV Gamma-ray source HESS J1834-087
- Chandra and H.E.S.S. observations of the Supernova Remnant CTB 37B
- The Energy Spectrum of Anomalous X-ray Pulsars and Soft Gamma-ray Repeaters
- From supernovae to neutron stars
- Chandra observation of the Galactic supernova remnant CTB 109 (G109.1-1.0)
- North-South Neutrino Heating Asymmetry in Strongly Magnetized and Rotating Stellar Cores
- Relativistic Mean-Field Treatment of Pulsar Kick from Neutrino Propagation in Magnetized Proto-Neutron
- Asymmetric neutrino emission due to neutrino-nucleon scatterings in supernova magnetic fields
- Rapid Spin Deceleration of Magnetized Proto-Neutron Stars via Asymmetric Neutrino Emission
Cited by in corpus (3)
- Magnetar Broadband X-ray Spectra Correlated with Magnetic Fields: Suzaku Archive of SGRs and AXPs Combined with NuSTAR, Swift, and RXTE
- Postglitch exponential relaxation of radio pulsars and magnetars in terms of vortex creep across flux tubes
- Impact of magnetic field on neutrino-matter interactions in core-collapse supernova