Anomalous X-ray pulsar

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 ~10¹³–10¹⁵ gauss (1 to 100 gigateslas). {{As of|2017}}, there were 12 confirmed and 2 candidate AXPs known.[http://www.physics.mcgill.ca/~pulsar/magnetar/main.html SGR/AXP Online Catalog] (An online catalog of SGR/AXP properties maintained by the pulsar group at McGill University) The identification of AXPs with magnetars was motivated by their similarity to soft gamma repeaters.

colspan=3\| The AXP candidates and their estimated rotation period in seconds, {{as of\|2003\|lc=on}}, were:
\| AXP 1E 2259+586	6.98
\| AXP 1E 1048-59	6.45
\| AXP 4U 0142+61	8.69
\| AXP 1RXS 1708-40	11.0
\| AXP 1E 1841-045	11.8
\| AXP AXJ1844-0258	6.97
\| AXP CXJ0110-7211	5.44
colspan=3\|The second, fourth, and last names have been abbreviated.

References

Sources

{{cite journal| bibcode=1995A&A...299L..41V| title=On the nature of the 'anomalous' 6-s X-ray pulsars| journal=Astronomy and Astrophysics| volume=299| pages=L41| last1=Van Paradijs| first1=J.| last2=Taam| first2=R. E.| last3=Van Den Heuvel| first3=E. P. J.| year=1995}}
{{cite conference| doi=10.1063/1.50235| chapter=Magnetars| title=AIP Conference Proceedings| volume=366| pages=111| year=1996| last1=Duncan| first1=Robert C.| last2=Thompson| first2=Christopher}}
{{cite journal| bibcode=2003SciAm.288b..34K| title=Magnetars| journal=Scientific American| volume=288| issue=2| pages=34–41| last1=Kouveliotou| first1=Chryssa| last2=Duncan| first2=Robert C.| last3=Thompson| first3=Christopher| year=2003| doi=10.1038/scientificamerican0203-34| pmid=12561456}}

External links

[https://web.archive.org/web/20090213124158/http://capca.ucalgary.ca/~bniebergal/webPHP/research.php?subdir=strangeQuarkStars Meissner Effect in Quark Stars] (University of Calgary)