Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...2e..32r&link_type=abstract
On the Present and Future of Pulsar Astronomy, 26th meeting of the IAU, Joint Discussion 2, 16-17 August, 2006, Prague, Czech Re
Astronomy and Astrophysics
Astronomy
Scientific paper
Recently discovered double pulsar system J0737-3039 consisting of millisecond and normal pulsars in a 2.4 hour orbit provides us with unprecedented tests of general relativity and magnetospheric effects. One of the most interesting phenomena observed in this system is the eclipse of the millisecond pulsar in the radio at its conjunction with the normal pulsar. I will describe a theory which explains this observation as a result of synchrotron absorption of the millisecond pulsar radiobeam in the magnetosphere of the normal pulsar. Absorption is "induced" in a sense that the intense radiobeam of millisecond pulsar itself strongly modifies the properties of the plasma in the closed part of the normal pulsar magnetosphere: absorption of high-brightness temperature radio emission heats up particles already present there and also allows additional pair plasma to be trapped in this region by magnetic bottling effect. This theory self-consistently predicts the size of the eclipsing region which agrees very well with the observed duration of eclipse. Recent observations of the variability of transmission during the eclipse modulated at the rotation period of the normal pulsar have been interpreted as resulting from the absorption by the rigidly rotating dipolar-shaped magnetosphere which is in perfect agreement with our theory.
Goldreich Peter
Rafikov Roman R.
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