A high-frequency survey of the galactic plane for young and distant pulsars

Abstract

A survey has been conducted for radio pulsars along the northern galactic plane at 1400 MHz. Using a fast sampling rate and relatively high radio frequency, this survey minimized the selection effects associated with high galactic background emission, interstellar dispersion and multipath scattering, all of which had seriously affected previous major surveys. As a result, the search was sensitive to distant and shorter period pulsars at low galactic latitude. A total of 61 pulsars were detected of which 40 were not previously known. Most of the objects are at low galactic longitudes |$( -{5}^{\circ } \lt{}l\lt{}40^{\circ })$| and have high dispersion measures, |$DM\gtrsim400 \,\text{cm}^{-3}$| pc, suggesting that, for the first time, the survey significantly penetrated the pulsar population in the inner Galaxy.