The frequency 10 Hz in the distribution of radiopulsar periods.
Abstract
A special statistical procedure, based on computation of the socalled "commensurability spectrum", being applied to the distribution of periods of 330 pulsars revealed the dominant frequency ν_{0} = 10.05±0.07 Hz (period 0.0995±0.0007 s) of a quasiperiodic modulation of the distribution. This modulation means the presence of a statistically significant, at about 3.3 to 4.1sigma confidence level, deficit of a number of PSR with frequencies ν ≈ ν_{0}/n, where n is integer. The effect appears to be strongly pronounced for PSR with periods from 0.4 to about 1.6 s and can not be ascribed to some unknown observational selection effect.
 Publication:

Izvestiya Ordena Trudovogo Krasnogo Znameni Krymskoj Astrofizicheskoj Observatorii
 Pub Date:
 1987
 Bibcode:
 1987IzKry..76...93K
 Keywords:

 Periodic Variations;
 Pulsars;
 Radio Sources (Astronomy);
 Distribution Functions;
 Statistical Analysis;
 Astrophysics;
 Periods:Pulsars;
 Pulsars:Periods