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Article overview
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Spin period change and the magnetic fields of neutron stars in Be X-ray binaries in the SMC | | H. Klus
; W.C.G. Ho
; M.J. Coe
; R.H.D. Corbet
; L.J. Townsend
; | | Date: |
18 Nov 2013 | | Abstract: | We report on the long term average spin period, rate of change of spin period
and X-ray luminosity during outbursts for 42 Be X-ray binary systems in the
Small Magellanic Cloud. We also collect and calculate parameters of each system
and use this data to determine that all systems contain a neutron star which is
accreting via a disc, rather than a wind, and that if these neutron stars are
near spin equilibrium, then over half of them, including all with spin periods
over about 100 seconds, have magnetic fields over the quantum critical level of
4.4x10^13 G. If these neutron stars are not close to spin equilibrium, then
their magnetic fields are inferred to be much lower, on the order of 10^6-10^10
G, comparable to the fields of neutron stars in low mass X-ray binaries. Both
results are unexpected and have implications for the rate of magnetic field
decay and the isolated neutron star population. | | Source: | arXiv, 1311.4343 | | Services: | Forum | Review | PDF | Favorites | |
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