Isolated pulsar spin evolution on the P-Pdot Diagram

Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

9 pages, 4 figures

Scientific paper

We look at two contrasting spin-down models for isolated radio pulsars and, accounting for selection effects, synthesize observable populations. While our goal is to reproduce all of the observable characteristics, in this paper we pay particular attention to the form of the spin period vs. period derivative (P-Pdot) diagram and its dependence on various pulsar properties. We analyse the initial spin period, the braking index, the magnetic field, various beaming models, as well as the pulsar's luminosity. In addition to considering the standard magnetic dipole model for pulsar spin-down, we also consider the recent hybrid model proposed by Contopoulos & Spitkovsky. The magnetic dipole model, however, does a better job of reproducing the observed pulsar population. We conclude that random alignment angles and period dependent luminosity distributions are essential to reproduce the observed P-Pdot diagram. We also consider the time decay of alignment angles, and attempt to reconcile various models currently being studied. We conclude that, in order to account for recent evidence for the alignment found by Weltevrede & Johnston, the braking torque on a neutron star should not depend strongly on the inclination. Our simulation code is publically available and includes a web-based interface to examine the results and make predictions for yields of current and future surveys.

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

Isolated pulsar spin evolution on the P-Pdot Diagram 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 Isolated pulsar spin evolution on the P-Pdot Diagram, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Isolated pulsar spin evolution on the P-Pdot Diagram will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-568375

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