The Radial Distribution of Pulsar in Galaxy

Xie, Jintao

Parks Multibeam pulsar surveys are by far the largest scale high-sensitivity project, which found more than half of normal pulsars. Its data allow us to mine more information about pulsars, especially to understand the distribution of pulsars in galaxies. We used the YMW16 galaxy electron density model to estimate the pulsar distance. To estimate the direction-dependent correcting factor we used the new sky temperature map (Remazeilles et al. 2015) and analyzed the distribution of pulsar flux density at 1400 MHz. Using the new directional selection factor calculation model and the distance calculated by the new electron density model YMW16, we update the calculation of the radial distribution function of the pulsar surface density in the Milky Way. According to our calculation, the surface density of the pulsar reaches its maximum value at 3.61 \pm 0.23 kpc away from the galactic center. For the total number of pulsars that can be detected in the Milky Way galaxy, our calculation results are (13 \pm 2) \times 10^3, and after correction with the TM98 beam model, the total number of pulsars is (130 \pm 20) \times 10^3.