(Anomalous) X-ray Pulsars

@inproceedings{Kaspi2004AnomalousXP,
  title={(Anomalous) X-ray Pulsars},
  author={V. Kaspi and F. Gavriil},
  year={2004}
}
Abstract We review the observational properties of the class of young neutron stars known as “anomalous X-ray pulsars,” emphasizing the tremendous progress that has been made in recent years, and explain why these objects, like the “soft gamma repeaters,” are today thought to be young, isolated, ultrahigh magnetic field neutron stars, or “magnetars.” 

Figures and Tables from this paper

RXTE and “Anomalous” X‐ray Pulsars
We review the observational properties of the so‐called “anomalous X‐ray pulsars,” a class of young neutron stars having properties very different from most of the population. RXTE has providedExpand
Magnetars: structure and evolution from p-star models
P-stars are compact stars made of up-and-down quarks in β -equilibrium with electrons in a chromomagnetic condensate. We discuss p-stars endowed with super strong dipolar magnetic field that,Expand
Red Noise in Anomalous X‐ray Pulsar Timing Residuals
Anomalous X‐ray Pulsars (AXPs), thought to be magnetars, exhibit poorly understood deviations from a simple spin‐down called “timing noise”. AXP timing noise has strong low‐frequency components whichExpand
Nonlinear Electrodynamics and the Surface Redshift of Pulsars
It is currently argued that the best method of determining neutron star (NS) fundamental properties is by measuring the gravitational redshift z of spectral lines produced in the stellar photosphere.Expand
Magnetars as cooling neutron stars with internal heating
We study thermal structure and evolution of magnetars as cooling neutron stars with a phenomenological heat source in a spherical internal layer. We explore the location of this layer as well as theExpand
Studies on Axions as the Energy Source in Magnetar
Highly magnetized neutron stars known as magnetars are some of the most interesting objects in the Universe. Non-baryonic dark matter candidate axions are produced in the highly magnetized neutronExpand
Correlated Infrared and X-ray variability of the transient Anomalous X-ray Pulsar XTE J1810-197
We report on observations aimed at searching for flux variations from the proposed IR counterpart of the Anomalous X-ray Pulsar (AXP) XTE J1810−197. These data, obtained in March 2004 with theExpand
Cooling of magnetars with internal layer heating
Abstract We model thermal evolution of magnetars with a phenomenological heat source in a spherical internal layer and compare the results with observations of persistent thermal radiation fromExpand
Atmospheres of magnetized neutron stars: Vacuum polarization and partially ionized models
We construct hydrogen atmospheric models for magnetized neutron stars (NSs) in radiative equilibrium with surface fields B ¼ 10 12 -5 � 10 14 G and effective temperatures Teffa few � 10 5 -10 6 K byExpand
Condensed surfaces of magnetic neutron stars, thermal surface emission, and particle acceleration above pulsar polar caps
Recent calculations indicate that the cohesive energy of condensed matter increases with magnetic field strength and becomes very significant at magnetar-like fields (e.g. 10 keV at 3 × 10 14 G forExpand
...
1
2
...

References

SHOWING 1-10 OF 46 REFERENCES
Magnetar-like X-ray bursts from an anomalous X-ray pulsar
TLDR
Two X-ray bursts, with properties similar to those of SGRs, from the direction of the anomalousX-ray pulsar 1E1048.1 - 5937.1 imply a close relationship (perhaps evolutionary) between AXPs and S GRs, with both being magnetars. Expand
An optical counterpart to the anomalous X-ray pulsar 4U0142+61
TLDR
Deep optical observations of the field around 4U0142+61, which is the brightest AXP in X-rays, are reported, and an object with peculiar optical colours at the position of the X-ray source is found, and it is argued that it is the optical counterpart. Expand
Diagnosing magnetars with transient cooling
Transient X-ray emission, with an approximate t-0.7 decay, was observed from SGR 1900+14 over 40 days following the giant flare of 1998 August 27. We calculate in detail the diffusion of heat to theExpand
The Soft Gamma Repeaters as Very Strongly Magnetized Neutron Stars. II. Quiescent Neutrino, X-Ray, and Alfvén Wave Emission
We calculate the quiescent X-ray, neutrino, and Alfven wave emission from a neutron star with a very strong magnetic field, Bdipole ~ 1014 − 1015 G and Binterior ~ (5–10) × 1015 G. These results areExpand
Do magnetars glitch? Timing irregularities in anomalous X-ray pulsars
We examine the timing history of several anomalous X-ray pulsars (AXPs), and find that they exhibit spin-down irregularities that are statistically similar to those of radio pulsars. We propose thatExpand
Constraints on thermal emission models of anomalous x-ray pulsars
Thermal emission from the surface of an ultramagnetic neutron star is believed to contribute significantly to the soft X-ray flux of the anomalous X-ray pulsars (AXPs). We compare the detailedExpand
Optical pulsations from the anomalous X-ray pulsar 4U0142+61
TLDR
The pulsed fraction of optical light is five to ten times greater than that of soft X-rays, from which it is concluded that 4U0142+61 is a magnetar, which establishes a direct relationship between AXPs and the soft γ-ray repeaters, the evolutionary connection betweenAXPs, SGRs and radio pulsars remains controversial. Expand
The Quiescent Counterpart of the Soft Gamma-Ray Repeater SGR 0526–66
It is now commonly believed that soft gamma-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are magnetars—neutron stars powered by their magnetic fields. However, what differentiates theseExpand
Proton Cyclotron Features in Thermal Spectra of Ultramagnetized Neutron Stars
A great deal of interest has been recently raised in connection with the possibility that soft γ-ray repeaters (SGRs) and anomalous X-ray pulsars (AXPs) contain magnetars, young neutron stars endowedExpand
Electrodynamics of Magnetars: Implications for the Persistent X-Ray Emission and Spin-down of the Soft Gamma Repeaters and Anomalous X-Ray Pulsars
We consider the structure of neutron star magnetospheres threaded by large-scale electrical currents and the effect of resonant Compton scattering by the charge carriers (both electrons and ions) onExpand
...
1
2
3
4
5
...