Spectral properties of 441 radio pulsars Virtual Observatory Resource

Authors
  1. Jankowski F.
  2. Van Straten W.
  3. Keane E.F.
  4. Bailes M.
  5. Barr E.D.,Johnston S.
  6. Kerr M.
  7. Published by
    CDS
Abstract

We present a study of the spectral properties of 441 pulsars observed with the Parkes radio telescope near the centre frequencies of 728, 1382 and 3100MHz. The observations at 728 and 3100MHz were conducted simultaneously using the dual-band 10-50cm receiver. These high-sensitivity, multifrequency observations provide a systematic and uniform sample of pulsar flux densities. We combine our measurements with spectral data from the literature in order to derive the spectral properties of these pulsars. Using techniques from robust regression and information theory, we classify the observed spectra in an objective, robust and unbiased way into five morphological classes: simple or broken power law, power law with either low- or high-frequency cut-off and log-parabolic spectrum. While about 79 per cent of the pulsars that could be classified have simple power-law spectra, we find significant deviations in 73 pulsars, 35 of which have curved spectra, 25 with a spectral break and 10 with a low-frequency turn-over. We identify 11 gigahertz-peaked spectrum (GPS) pulsars, with 3 newly identified in this work and 8 confirmations of known GPS pulsars; 3 others show tentative evidence of GPS, but require further low-frequency measurements to support this classification. The weighted mean spectral index of all pulsars with simple power-law spectra is -1.60+/-0.03. The observed spectral indices are well described by a shifted log-normal distribution. The strongest correlations of spectral index are with spin-down luminosity, magnetic field at the light-cylinder and spin-down rate. We also investigate the physical origin of the observed spectral features and determine emission altitudes for three pulsars.

Keywords
  1. astronomical-models
  2. pulsars
  3. radio-continuum-emission
  4. radio-sources
  5. stellar-spectral-types
Bibliographic source Bibcode
2018MNRAS.473.4436J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/473/4436
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/473/4436
Document Object Identifer DOI
doi:10.26093/cds/vizier.74734436

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/473/4436
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/473/4436
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/473/4436
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https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/473/4436/tablec1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/473/4436/tablec1?

History

2018-03-29T14:30:49Z
Resource record created
2018-03-29T14:30:49Z
Created
2024-08-17T20:21:41Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr