J/other/RAA/24.F5028 Glitch activity parameters of pulsars (Eya+, 2024)
Pulsar Glitch Activities: The Spin Parameters Approach.
Eya I.O., Iyida E.U.
<Res. Astron. Astrophys., 24, 065028 (2024)>
=2024RAA....24f5028E 2024RAA....24f5028E (SIMBAD/NED BibCode)
ADC_Keywords: Pulsars ; Millimetric/submm sources
Keywords: stars: neutron - (stars:) pulsars: general - methods: statistical
Abstract:
Glitch activity refers to the mean increase in pulsar spin frequency
per year due to rotational glitches. It is an important tool for
studying super-nuclear matter using neutron star interiors as
templates. Glitch events are typically observed in the spin frequency
(nu) and frequency derivative (dnu/dt) of pulsars. The rate of glitch
recurrence decreases as the pulsar ages, and the activity parameter is
usually measured by linear regression of cumulative glitches over a
given period. This method is effective for pulsars with multiple
regular glitch events. However, due to the scarcity of glitch events
and the difficulty of monitoring all known pulsars, only a few have
multiple records of glitch events. This limits the use of the activity
parameter in studying neutron star interiors with multiple pulsars. In
this study, we examined the relationship between the activity
parameters and pulsar spin parameters (spin frequency, frequency
derivative, and pulsar characteristic age). We found that a quadratic
function provides a better fit for the relationship between activity
parameters and spin parameters than the commonly used linear
functions. Using this information, we were able to estimate the
activity parameters of other pulsars that do not have records of
glitches. Our analysis shows that the relationship between the
estimated activity parameters and pulsar spin parameters is consistent
with that of the observed activity parameters in the ensemble of
pulsars.
Description:
The pulsar spin parameters are from Manchester et al.
(2005AJ....129.1993M 2005AJ....129.1993M, Cat. B/psr) and updated with the Australia
Telescope National Facility (ATNF,
https://www.atnf.csiro.au/research/pulsar/psrcat) pulsar catalog and
references therein.
The glitch parameters are from Espinoza et al. (2011MNRAS.414.1679E 2011MNRAS.414.1679E,
Cat. J/MNRAS/414/1679), Basu et al. (2022MNRAS.510.4049B 2022MNRAS.510.4049B) and updated
with the Jodrell Bank Observatory pulsar glitches
(http://www.jb.man.ac.uk/pulsar/glitches/original.html and
http://www.jb.man.ac.uk/pulsar/glitches.html) and references therein.
For a large compilation of {DELTA}ν, one can readily access
http://www.jb.man.ac.uk/pulsar/glitches/original.html.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 30 2215 Glitch activity parameters of pulsars
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See also:
B/psr : ATNF Pulsar Catalogue (Manchester+, 2005)
J/MNRAS/414/1679 : 315 glitches in the rotation of 102 pulsars
(Espinoza+, 2011)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Pulsar Pulsar name
14- 21 E8.4 yr-1 ag Glitch activity
23- 30 E8.4 Hz/yr Ag Activity parameter
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Aug-2025