Constraining vacuum gap models of pulsar radio emission using the intensity modulation index

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Submitted to ApJ Letters

Scientific paper

Recent observations suggest that the level of pulse-to-pulse intensity modulation observed in a given radio pulsar may depend on its period and period derivative. Such a ``modulation index relationship'' (MIR) may be an important tool for determining the physical processes behind the radio emission. In the context of sparking gap models, the exact functional form of the MIR depends on the physical processes occurring on the surface of the neutron star in the region known as the ``vacuum gap.'' Several possible vacuum gap models are studied here in order to determine the expected MIR for a given model. Current observations are consistent with two of the four models studied: the curvature radiation driven vacuum gap and the curvature radiation driven near threshold vacuum gap (CR-NTVG). It is shown that the inverse Compton scattering driven vacuum gap models are not supported by the current data. Given that the current data best supports the CR-NTVG model, its possible that all pulsars have strong (approx 10^13 G) surface magnetic fields.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Constraining vacuum gap models of pulsar radio emission using the intensity modulation index does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Constraining vacuum gap models of pulsar radio emission using the intensity modulation index, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining vacuum gap models of pulsar radio emission using the intensity modulation index will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-112073

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.