Other
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1621m&link_type=abstract
American Astronomical Society, HEAD meeting #11, #16.21; Bulletin of the American Astronomical Society, Vol. 41, p.682
Other
Scientific paper
The intermittent pulsar B1931+24 is observed to be ON for about a week at a time and OFF for about a month in between. Compared to its period of about 0.8 seconds, each interval is effectively "forever". The more popular theories are based on an old model that suggests that pulsars cannot be OFF, but are fundamentally doomed to be active at all times. The alternative theory which has had less attention is just the opposite and in its simplest form suggests that the pulsar could instead be OFF at all times. We now know that the later is not true owing to magnetic pair production (ApJ, 383, 808, 1991), which additionally explains coherent radio emission as being due to particle bunching. An obvious explanation of B1931+24 (and others are known) is that pulsars can become "stuck" in between these limiting states. If this is true, the obvious conclusion is that in the OFF state it has no currents to/from the neutron star and is being slowed purely from magnetic dipole radiation (n=3, in the simplest limit, although there may be corrections from change in inclination).
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