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20th of June 2024
The flux density as a function of frequency for the pulsar J0125-2327.
Wideband polarization and spectral properties of 18 high Galactic latitude pulsars
by Ahmad et al.
The broad-spectrum polarization and spectral characteristics of pulsars contain crucial information about the origin of their radio emission. These properties, together with pulsar flux density variations, can also be used to guide future surveys of radio pulsars and probe the Galactic interstellar medium. Ahmad et al. present studies of 18 pulsars at high Galactic latitudes using the Ultra-Wideband Low (UWL) receiver of Murriyang, the Parkes radio telescope. They measured the wideband flux densities, spectral indices, and polarization fractions of these pulsars. Seven new rotation measures (RMs) were obtained, and the RMs of another ten pulsars were refined. Significant variations were observed in the flux densities of this sample of pulsars, suggesting that previous shallow surveys may have missed a population of pulsars at high galactic latitude. Most of the pulsars have power law spectra with the flux density decreasing with increasing frequency. The spectrum of J0125-2327 however is peaked, and falls off very steeply at the highest frequencies, with the peak possibly associated with the synchrotron self-absorption process. The black dashed line in the plot above is the best-fitting model.



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