Radio Proper Motions and a Search for the Origin of PSR B1849+00

TL;DR

This paper measures the proper motion of pulsar PSR B1849+00 using archival VLA data, revealing a high transverse velocity and exploring its possible origin, but finds no associated supernova remnant along its past trajectory.

Contribution

First measurement of PSR B1849+00 proper motion using archival VLA data, providing insights into its velocity and origin.

Findings

Proper motion of 23.9±5.5 mas/yr toward southwest.

Peculiar transverse velocity of approximately 740 km/s.

No associated supernova remnant found along the past trajectory.

Abstract

Until now it has not been possible to obtain the proper motions of PSR B1849+00 with timing techniques or VLBI imaging given the enhanced interstellar scattering along its line of sight. We present an analysis of archive Very Large Array observations at epochs from 2012 to 2022 that indicates a total proper motion of 23.9$\pm$5.5 mas yr$^{-1}$ toward the southwest. After correction for the proper motions produced by galactic rotation, we find a peculiar transverse velocity of $\simeq$740 km s$^{-1}$. We searched unsuccessfully along the past trajectory of the pulsar for an associated supernova remnant. In particular, W44 is in this trajectory but its distance is different to that of PSR B1849+00.