Low-magnetic-field magnetars
arXiv:1303.6052 · doi:10.1142/S0218271813300243
Abstract
It is now widely accepted that soft gamma repeaters and anomalous X-ray pulsars are the observational manifestations of magnetars, i.e. sources powered by their own magnetic energy. This view was supported by the fact that these `magnetar candidates' exhibited, without exception, a surface dipole magnetic field (as inferred from the spin-down rate) in excess of the electron critical field (~4.4E+13 G). The recent discovery of fully-qualified magnetars, SGR 0418+5729 and Swift J1822.3-1606, with dipole magnetic field well in the range of ordinary radio pulsars posed a challenge to the standard picture, showing that a very strong field is not necessary for the onset of magnetar activity (chiefly bursts and outbursts). Here we summarize the observational status of the low-magnetic-field magnetars and discuss their properties in the context of the mainstream magnetar model and its main alternatives.
18 pages, 5 figures; minor changes to match the published version
References in corpus (16)
- The strongest cosmic magnets: Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
- Transient pulsed radio emission from a magnetar
- Untwisting magnetospheres of neutron stars
- 1E 1547.0-5408: a radio-emitting magnetar with a rotation period of 2 seconds
- Magnetar-like Emission from the Young Pulsar in Kes 75
- Discovery of luminous pulsed hard X-ray emission from anomalous X-ray pulsars 1RXS J1708-4009, 4U 0142+61 and 1E 2259+586 by INTEGRAL and RXTE
- Magnetic field dissipation in neutron star crusts: from magnetars to isolated neutron stars
- 2D Cooling of Magnetized Neutron Stars
- The outburst decay of the low magnetic field magnetar SGR 0418+5729
- Magnetars as persistent hard X-ray sources: INTEGRAL discovery of a hard tail in SGR 1900+14
- CCOs and the hidden magnetic field scenario
- A new code for the Hall-driven magnetic evolution of neutron stars
- Proper Motions and Origins of SGR 1806-20 and SGR 1900+14
- Adaptive optics near-infrared observations of magnetars
- X-ray and radio observations of the magnetar Swift J1834.9-0846 and its dust-scattering halo
- Radiative properties of highly magnetized isolated neutron star surfaces and approximate treatment of absorption features in their spectra
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- The X-ray outburst of the Galactic Centre magnetar SGR J1745-2900 during the first 1.5 year
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- Atmosphere of strongly magnetized neutron stars heated by particle bombardment
- Discovery of a very young high-mass X-ray binary associated with the supernova remnant MCSNRJ0513-6724 in the LMC
- Pulse Phase-coherent Timing and Spectroscopy of CXOU J164710.2-45521 Outbursts
- Strongly magnetized pulsars: explosive events and evolution
- The multi-outburst activity of the magnetar in Westerlund I
- Classification of pulsars with Dirichlet process Gaussian mixture model
- An Overview of Compact Star Populations and Some of Its Open Problems
- Peculiarities of super-Eddington flares from the X-ray pulsar LMC X-4 with NuSTAR
- Multipolar Electromagnetic Emission of Newborn Magnetar
- Modeling the structure of magnetic fields in Neutron Stars: from the interior to the magnetosphere
- Fast Radio Bursts as crustal dynamical events induced by magnetic field evolution in young magnetars
- Consequences of Energetic Magnetar-Like Outbursts of Nearby Neutron Stars: C Events and the Cosmic Electron Spectrum