Anomalous X-ray pulsars (AXPs) are an observational manifestation of magnetars—young, isolated, highly magnetized neutron stars. These energetic X-ray pulsars are characterized by slow rotation periods of ~2–12 seconds and large magnetic fields of ~10<sup>13</sup>–10<sup>15</sup> gauss (1 to 100 gigateslas). , there were 12 confirmed and 2 candidate AXPs known. The identification of AXPs with magnetars was motivated by their similarity to soft gamma repeaters.

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|colspan=3| The AXP candidates and their estimated rotation period in seconds, , were:

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|| AXP 1E 2259+586 || 6.98 || &nbsp;

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|| AXP 1E 1048-59 || 6.45 || &nbsp;

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|| AXP 4U 0142+61 || 8.69 || &nbsp;

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|| AXP 1RXS 1708-40 || 11.0 || &nbsp;

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|| AXP 1E 1841-045 || 11.8 || &nbsp;

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|| AXP AXJ1844-0258 || 6.97 || &nbsp;

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|| AXP CXJ0110-7211 || 5.44 || &nbsp;

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|colspan=3|The second, fourth, and last names have been abbreviated.

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References

Sources

  • Meissner Effect in Quark Stars (University of Calgary)