Trends in Pulsar Research (Google eBook)
John A. Lowry
Nova Publishers, 2007 - Science - 211 pages
Pulsars are stars, a significant part of whose observed energy output is not continuous but is emitted as distinct flashes or pulses of electromagnetic radiation. Many pulsars also emit some radiation weakly and constantly, forming a background for the more intensive pulses. Three distinct classes of pulsars are presently known to astronomers, according to the source of energy that powers the radiation: Rotation-powered pulsars, where the loss of rotational energy of the star powers the radiation X-ray pulsars, where the gravitational potential energy of accreted matter is the energy source, and Magnetars, where the decay of an extremely strong magnetic field powers the radiation. Although all three classes of objects are neutron stars, their observable behaviour and the underlying physics are quite different. There are, however, connections. For example, X-ray pulsars are probably old rotation-powered pulsars that have already lost most of their energy, and have only become visible again after their binary companions expanded and began transferring matter on to the neutron star. The process of accretion can in turn transfer enough angular momentum to the neutron star to "recycle" it as a rotation-powered millisecond pulsar.
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The Origin of the Magnetic Field of Pulsars and the Gravitomagnetic Theory
AccretionDriven Millisecond XRay Pulsars
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Wijnands, R. Nova Science Accretion-Driven Millisecond X-ray ...
Wijnands, R. Nova Science Accretion-Driven Millisecond X-ray Pulsars Trends in Pulsar Research Hauppauge, usa Lowry, ja 2005 print in press ...
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