Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...515a..21c&link_type=abstract
Astronomy and Astrophysics, Volume 515, id.A21
Astronomy and Astrophysics
Astrophysics
Methods: Statistical, Pulsars: General
Scientific paper
A quantitative analysis of radio pulsar timing noise is presented. Our analysis employs the recently reported strong correlation (with correlation coefficient r = 0.95) between the observed second time derivative of the pulse rotation frequency (ddotνobs), obtained from fully phase-coherent timing analyses, and a timing noise statistic (σR23), used to quantify the amount of pulsar rotational fluctuations absorbed by the coefficient of the cubic term, to isolate the presumed deterministic braking index from the effects attributable to pulsar timing activity. Application of this method to a sample of 27 radio pulsars, whose timing data span 9-13 years, reveals that (i) for 22 pulsars, a sensible braking index measurement was impossible: with numerical values of the braking index either appreciably less than the corresponding uncertainty or anomalously large; (ii) save for the relatively large uncertainties, the braking index appears to be significantly measured in five pulsars. Current results are discussed in the context of the prevailing standard model for radio pulsar spin-down.
Baiden A. A.
Chukwude Augustine E.
Onuchukwu C. C.
No associations
LandOfFree
Measurements of radio pulsar braking indices 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 Measurements of radio pulsar braking indices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurements of radio pulsar braking indices will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1344083