Astronomy:Anomalous X-ray pulsar
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Anomalous X-ray Pulsars (AXPs) are now widely believed to be 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). There are currently ((As of 2017)) 12 confirmed and 2 candidate AXPs.[1] The identification of AXPs with magnetars was motivated by their similarity to another enigmatic class of sources, the soft gamma repeaters.
| A list of AXP candidates and their estimated rotation period in seconds, as of 2003, follows: | ||
| 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 | |
| Please note that the second, fourth, and last names were abbreviated | ||
References
- ↑ SGR/AXP Online Catalog (An online catalog of SGR/AXP properties maintained by the pulsar group at McGill University)
Sources
- Van Paradijs, J.; Taam, R. E.; Van Den Heuvel, E. P. J. (1995). "On the nature of the 'anomalous' 6-s X-ray pulsars". Astronomy and Astrophysics 299: L41. Bibcode: 1995A&A...299L..41V.
- Duncan, Robert C.; Thompson, Christopher (1996). "AIP Conference Proceedings". 366. pp. 111. doi:10.1063/1.50235.
- Kouveliotou, Chryssa; Duncan, Robert C.; Thompson, Christopher (2003). "Magnetars". Scientific American 288 (2): 34. doi:10.1038/scientificamerican0203-34. PMID 12561456. Bibcode: 2003SciAm.288b..34K.
External links
- Meissner Effect in Quark Stars (University of Calgary)
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