Статья

The Thousand Pulsar Array program on MeerKAT – IX. The time-averaged properties of the observed pulsar population

B. PosseltDepartment of Astronomy & Astrophysics, Pennsylvania State University , 525 Davey Lab, University Park, PA 16802,A. KarastergiouDepartment of Astrophysics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH,S. JohnstonAustralia Telescope National Facility, CSIRO Space and Astronomy , PO Box 76, Epping, NSW 1710,A. ParthasarathyMax-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn,L S OswaldDepartment of Astrophysics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH,Robert MainMax-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn,Avishek BasuJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy , University of Manchester, Manchester M13 9PL,M. J. KeithJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy , University of Manchester, Manchester M13 9PL,X SongJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy , University of Manchester, Manchester M13 9PL,P. WeltevredeJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy , University of Manchester, Manchester M13 9PL,C. TiburziINAF, Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius,M. BailesARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) , PO Box 218, Hawthorn, VIC 3122,S. BuchnerSouth African Radio Astronomy Observatory, Cape Town, South AfricaM. GeyerDepartment of Astronomy, University of Cape Town , Rondebosch, Cape Town 7700,Michael KramerJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy , University of Manchester, Manchester M13 9PL,R. SpiewakARC Centre of Excellence for Gravitational Wave Discovery (OzGrav) , PO Box 218, Hawthorn, VIC 3122,V. Venkatraman KrishnanMax-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn,

2022en

ABI

Аннотация

ABSTRACT We present the largest single survey to date of average profiles of radio pulsars, observed and processed using the same telescope and data reduction software. Specifically, we present measurements for 1170 pulsars, observed by the Thousand Pulsar Array programme at the 64-dish SARAO MeerKAT radio telescope, in a frequency band from 856 to 1712 MHz. We provide rotation measures (RM), dispersion measures, flux densities, and polarization properties. The catalogue includes 254 new RMs that substantially increase the total number of known pulsar RMs. Our integration times typically span over 1000 individual rotations per source. We show that the radio (pseudo-) luminosity has a strong, shallow dependence on the spin-down energy, proportional to $\dot{E}^{0.15\pm 0.04}$, that contradicts some previous proposals of population synthesis studies. In addition, we find a significant correlation between the steepness of the observed flux density spectra and $\dot{E}$, and correlations of the fractional linear polarization with $\dot{E}$, the spectral index, and the pulse width, which we discuss in the context of what is known about pulsar radio emission and how pulsars evolve with time. On the whole, we do not see significant correlations with the estimated surface magnetic field strength, and the correlations with $\dot{E}$ are much stronger than those with the characteristic age. This finding lends support to the suggestion that magnetic dipole braking may not be the dominant factor for the evolution of pulsar rotation over the lifetimes of pulsars. A public data release of the high-fidelity time-averaged pulse profiles in full polarization accompanies our catalogue.

Перевод пока недоступен

Идентификаторы

DOI: 10.1093/mnras/stac3383

Цитирования и источники

Цитирований: 1Использованных источников: 0

Показатели — AkademScholar