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
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Journal ArticleDOI
Evidence for a 36 ks phase modulation in the hard X-ray pulses from the magnetar 1E 1547.0−5408
Kazuo Makishima,Teruaki Enoto,Hiroaki Murakami,Yoshihiro Furuta,Toshio Nakano,Makoto Sasano,Kazuhiro Nakazawa +6 more
TL;DR: In this article, the 2.07 s pulsation of the 15-40 keV emission detected with the HXD was found to be phase modulated, with a period of 36.0 −2.5 ks and an amplitude of 0.52± 0.14 s.
Journal ArticleDOI
XMM–Newton and Swift observations prove GRB 090709A to be a distant, standard, long GRB
A. De Luca,A. De Luca,Paolo Esposito,Paolo Esposito,G. L. Israel,Diego Götz,G. Novara,Andrea Tiengo,Sandro Mereghetti +8 more
TL;DR: In this paper, the authors obtained a target of opportunity observation with XMM-Newton and X-ray spectroscopy, which allowed them to model the significant excess in photoelectric absorption with respect to the Galactic value as due to a large column density in the GRB host, located at z ~ 4.2.
Journal ArticleDOI
Searching for x-ray variability in the glitching anomalous x-ray pulsar 1e 1841–045 in kes 73
Weiwei Zhu,Victoria M. Kaspi +1 more
TL;DR: In this paper, an analysis of archival X-ray data from the AXP 1E 1841-045, obtained between 1993 and 2007, has been carried out to find no evidence for glitch-correlated flux changes from this source after 1999, supporting the existence of radiatively silent glitches in AXPs.
Journal ArticleDOI
Axisymmetric force-free magnetosphere in the exterior of a neutron star
TL;DR: In this paper, the axisymmetric solutions for the force-free field with a power-law current model are calculated by taking into account general relativistic effects, and it is shown how the magnetic energy and helicity are accumulated along a sequence of equilibria.
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The $$SO(3,1) \times U(1)$$-gauge invariant approach to charged bosons in relativistic magnetars
TL;DR: In this paper, a perturbative method was used to investigate solutions of the Klein-Gordon equations for a charged massive field in the background of a magnetar, both in the interior solution and outside the star, where the variables can be separated and the wave function is expressed in terms of the Heun's general or confluent functions.
References
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