The strongest cosmic magnets: soft gamma-ray repeaters and anomalous X-ray pulsars
Abstract:
Two classes of X-ray pulsars, the anomalous X-ray pulsars and the soft gamma-ray repeaters, have been recognized in the last decade as the most promising candidates for being magnetars: isolated neutron stars powered by magnetic energy. I review the observational properties of these objects, focussing on the most recent results, and their interpretation in the magnetar model. Alternative explanations, in particular those based on accretion from residual disks, are also considered. The possible relations between these sources and other classes of neutron stars and astrophysical objects are also discussed.read more
Citations
More filters
Journal ArticleDOI
Possible changes of state and relevant timescales for a neutron star in LS I +61{\deg}303
TL;DR: In this article, the authors discuss the transitions among the states accessible to a neutron star in a system like LS I +61°deg}303, such as the ejector, propeller and accretor phases, depending on the NS spin period, magnetic field and rate of mass captured.
Journal ArticleDOI
The variable spin-down rate of the transient magnetar XTE J1810−197
Fabio Pintore,Federico Bernardini,Federico Bernardini,Sandro Mereghetti,Paolo Esposito,Roberto Turolla,Roberto Turolla,Nanda Rea,Nanda Rea,Francesco Coti Zelati,Francesco Coti Zelati,G. L. Israel,Andrea Tiengo,Andrea Tiengo,Andrea Tiengo,Silvia Zane +15 more
TL;DR: In this article, the evolution of the pulsar spin period was investigated, and evidence for two distinct regimes: during the outburst decay, the spin derivative (nu_dot) was highly variable in the range -(2-4.5)x10^-13 Hz/s, while during quiescence the spin-down rate was more stable at an average value of -1x10^{-13} Hz /s.
Journal ArticleDOI
Simultaneous Multi-band Radio & X-ray Observations of the Galactic Center Magnetar SGR 1745$-$2900
Timothy T. Pennucci,A. Possenti,Paolo Esposito,Nanda Rea,Daryl Haggard,Frederick K. Baganoff,M. Burgay,F. Coti Zelati,G. L. Israel,Anthony H. Minter +9 more
TL;DR: In this paper, the authors report on multi-frequency, wideband radio observations of the Galactic Center magnetar (SGR 1745$-$2900) with the Green Bank Telescope for approximately 100 days immediately following its initial X-ray outburst in April 2013.
Journal ArticleDOI
SGR 0418+5729, Swift J1822.3-1606, and 1E 2259+586 as massive fast rotating highly magnetized white dwarfs
TL;DR: In this paper, the mass, radius, moment of inertia, and magnetic field of the low magnetic field magnetars SGR 0418+5729, Swift J1822.3--1606, and AXP prototype 1E 2259+586 were analyzed.
Journal ArticleDOI
Comparing supernova remnants around strongly magnetized and canonical pulsars
TL;DR: In this article, a complete re-analysis of the archival X-ray emission of the supernova remnants (SNRs) surrounding magnetars was performed, and compared with all other bright Xray emitting SNRs, which are associated with compact central objects, high-B pulsars and normal pulsars.
References
More filters
Book
Compact Stellar X-ray Sources
TL;DR: A decade of X-ray sources and their evolution is described in this paper, with a focus on the formation and evolution of super-soft sources and the formation of compact stellar sources.
Journal ArticleDOI
Formation of very strongly magnetized neutron stars - Implications for gamma-ray bursts
TL;DR: In this article, it is argued that a convective dynamo can also generate a very strong dipole field after the merger of a neutron star binary, but only if the merged star survives for as long as about 10-100 ms.
Journal ArticleDOI
The soft gamma repeaters as very strongly magnetized neutron stars - I. Radiative mechanism for outbursts
Journal ArticleDOI
The Soft Gamma Repeaters as Very Strongly Magnetized Neutron Stars. II. Quiescent Neutrino, X-Ray, and Alfvén Wave Emission
TL;DR: In this article, the decay rate of the core field is a very strong function of temperature and therefore of the magnetic flux density, which is not present in the decay of the weaker fields associated with ordinary radio pulsars.
Journal ArticleDOI
An X-ray pulsar with a superstrong magnetic field in the soft γ-ray repeater SGR1806 − 20
Chryssa Kouveliotou,Chryssa Kouveliotou,S. Dieters,S. Dieters,Tod E. Strohmayer,Tod E. Strohmayer,J. van Paradijs,Gerald J. Fishman,Charles A. Meegan,Kevin Hurley,Jefferson M. Kommers,Ian Smith,Dale A. Frail,Toshio Murakami +13 more
TL;DR: In this paper, the authors reported the discovery of pulsations in the persistent X-ray flux of SGR1806-20, with a period of 7.47 s and a spindown rate of 2.6 x 10(exp -3) s/yr.