2021MNRAS.502.4669S


Query : 2021MNRAS.502.4669S

2021MNRAS.502.4669S - Mon. Not. R. Astron. Soc., 502, 4669-4679 (2021/April-3)

A statistical analysis of the nulling pulsar population.

SHEIKH S.Z. and MacDONALD M.G.

Abstract (from CDS):

Approximately 8 per cent of the ∼2800 known pulsars exhibit 'nulling,' a temporary broad-band cessation of normal pulsar emission. Nulling behaviour can be coarsely quantified by the nulling fraction, which describes the percentage of time a given pulsar will be found in a null state. In this paper, we perform the most thorough statistical analysis thus far of the properties of 141 known nulling pulsars. We find weak, non-linear correlations between nulling fraction and pulse width, as well as nulling fraction and spin period which could be attributed to selection effects. We also further investigate a recently hypothesized gap at 40 per cent nulling fraction. While a local minimum does exist in the distribution, we cannot confirm a consistent and unique break in the distribution when we investigate with univariate and multivariate clustering methods, nor can we prove the existence of two statistically distinct populations about this minimum. Using the same methods, we find that nulling pulsars are a statistically different population from normal, radio, non-nulling pulsars, which has never been quantitatively verified. In addition, we summarize the findings of the prior nulling pulsar statistics literature, which are notoriously contradictory. This study, in context, furthers the idea that nulling fraction alone does not contain enough information to describe the behaviour of a nulling pulsar and that other parameters such as null lengths and null randomness, in addition to a better understanding of selection effects, are required to fully understand this phenomenon.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): pulsars: general - stars: statistics - methods: statistical

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PSR B1641-45 Psr 16 44 49.2730 -45 59 09.710     12.60     ~ 184 0
2 PSR B1706-16 Psr 17 09 26.4470 -16 40 56.200           ~ 205 0
3 PSR B1713-40 Psr 17 17 52.3600 -41 03 17.800           ~ 29 0

    Equat.    Gal    SGal    Ecl

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2021.07.27-20:44:05

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