The Thousand-Pulsar-Array programme on MeerKAT – XV. A comparison of the radio emission properties of slow and millisecond pulsars

ABSTRACT We use data from the MeerTime project on the MeerKAT telescope to ask whether the radio emission properties of millisecond pulsars (MSPs) and slowly rotating, younger pulsars (SPs) are similar or different. We show that the flux density spectra of both populations are similarly steep, and t...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2024-08, Vol.532 (3), p.3558-3566
Hauptverfasser: Karastergiou, A, Johnston, S, Posselt, B, Oswald, L S, Kramer, M, Weltevrede, P
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container_end_page 3566
container_issue 3
container_start_page 3558
container_title Monthly notices of the Royal Astronomical Society
container_volume 532
creator Karastergiou, A
Johnston, S
Posselt, B
Oswald, L S
Kramer, M
Weltevrede, P
description ABSTRACT We use data from the MeerTime project on the MeerKAT telescope to ask whether the radio emission properties of millisecond pulsars (MSPs) and slowly rotating, younger pulsars (SPs) are similar or different. We show that the flux density spectra of both populations are similarly steep, and the widths of MSP profiles obey the same dependence on the rotational period as slow pulsars. We also show that the polarization of MSPs has similar properties to slow pulsars. The commonly used pseudo-luminosity of pulsars, defined as the product of the flux density and the distance squared, is not appropriate for drawing conclusions about the relative intrinsic radio luminosity of SPs and MSPs. We show that it is possible to scale the pseudo-luminosity to account for the pulse duty cycle and the solid angle of the radio beam, in such a way that MSPs and SPs do not show clear differences in intrinsic luminosity. The data therefore support common emission physics between the two populations in spite of orders of magnitude difference in their period derivatives and inferred, surface, dipole magnetic field strengths.
doi_str_mv 10.1093/mnras/stae1694
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subjects Dipoles
Flux density
Luminosity
Magnetic properties
Millisecond pulsars
Populations
Pulsars
Radio emission
Rotational spectra
title The Thousand-Pulsar-Array programme on MeerKAT – XV. A comparison of the radio emission properties of slow and millisecond pulsars
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