The analysis of the largest sample of multi-frequency pulsar scatter time estimates

Abstract

We present our results of pulse broadening time estimates and the study of the frequency scaling of this quantity for 60 pulsars based on actual multi-frequency scattering estimates. This research was based on our own measurements, performed on the observational data and the profiles from various pulsar profile databases, as well as the scatter time measurements that were found in the literature. We were able to construct a database of over 60 pulsars with true multi-frequency $\alpha$ measurements, which allowed us to revise the previously proposed relations between the scatter time spectral slope and the dispersion measure (DM). We found that the deviations from theoretical predictions of the value of $\alpha$ appear for pulsars regardless of their DM, however the DM-averaged value of the scaling index is almost constant except for pulsars with very high DMs. Based on the obtained slopes we were also able to estimate the amount of scattering at the standard frequency of 1 GHz. We found that while the estimated standardized pulse broadening time increases with DM the relation seems to be much flatter than it was previously proposed, which suggests higher values of the scatter time for mid-DM pulsars, and lower values of expected pulse broadening for highly dispersed sources.

14 pages + 6 pages of appendix (4 figures, 3 tables), accepted to MNRAS

References in corpus (3)

• The ATNF Pulsar Catalogue
• Pulsars with gigahertz-peaked spectra
• Flux-density spectral analysis for several pulsars and two newly-identified gigahertz-peaked spectra

Cited by in corpus (19)

• Scattering analysis of LOFAR pulsar observations
• Scatter broadening of pulsars and implications on the interstellar medium turbulence
• On the origin of the scatter broadening of fast radio burst pulses and astrophysical implications
• A sub-arcsec localised fast radio burst with a significant host galaxy dispersion measure contribution
• Locating the intense interstellar scattering towards the inner Galaxy
• Multi-frequency scatter broadening evolution of pulsars - I
• Scattering study of Pulsars below 100 MHz using LWA1
• Upgraded GMRT survey for pulsars in globular clusters. I: Discovery of a millisecond binary pulsar in NGC 6652
• Probing pulsar scattering between 120 and 280 MHz with the MWA
• Multi-frequency scatter broadening evolution of pulsars - II. Scatter broadening of nearby pulsars
• Radio Detection of PSR J1813-1749 in HESS J1813-178: The Most Scattered Pulsar Known
• NE2025: An Updated Electron Density Model for the Galactic Interstellar Medium
• TRAPUM search for pulsars in supernova remnants and pulsar wind nebulae -- I. Survey description and initial discoveries
• Electron density variations in the interstellar medium and the average frequency profile of a scintle from pulsar scintillation spectra
• A Multifrequency Census of 100 Pulsars below 100 MHz with LWA: A Systematic Study of Flux Density, Spectra, Timing, Dispersion, Polarization, and Its Variation from a Decade of Observations
• The Galactic distribution of pulsar scattering and the $\tau -\mathrm{DM}$ relation
• Simultaneous Observations of Giant Pulses from Pulsar PSR B0031-07 at 38 MHz and 74 MHz
• TRAPUM pulsar and transient search in the Sextans A and B galaxies and discovery of background FRB 20210924D
• Analysis of Scattering from Archival Pulsar Data using a CLEAN-based Method