29 October 2018 | G. Hobbs, D.R. Lorimer, A.G. Lyne, M. Kramer
This paper presents an updated catalogue of 233 pulsar proper motions, significantly expanding the previous sample. The catalogue includes a wide variety of pulsars, such as recycled objects and those associated with globular clusters or supernova remnants. The majority of the proper motions (58%) are derived from pulsar timing methods, 41% from interferometers, and 1% from optical telescopes. The mean 1-D speeds for normal and recycled pulsars are 152(10) km s\(^{-1}\) and 54(6) km s\(^{-1}\), respectively, while the corresponding mean 2-D speeds are 246(22) km s\(^{-1}\) and 87(13) km s\(^{-1}\). PSRs B2011+38 and B2224+64 have the highest inferred 2-D speeds of \(\sim 1600\) km s\(^{-1}\). The study also examines the statistical properties of different subsamples and finds that the mean speeds generally agree with previous results. A novel deconvolution technique is applied to a sample of 73 pulsars with characteristic ages less than 3 Myr, yielding a mean 3-D pulsar birth velocity of 400(40) km s\(^{-1}\). The velocity distribution is well described by a Maxwellian distribution with a 1-D rms of 265 km s\(^{-1}\), and there is no evidence for a bimodal velocity distribution. The proper motions for PSRs B1830+08 and B2334+61 are consistent with their proposed associations with supernova remnants W41 and G114.3+0.3, respectively. The findings suggest that the true space velocities of young pulsars range from a few tens to over 1000 km s\(^{-1}\), with a mean velocity of 400(40) km s\(^{-1}\).This paper presents an updated catalogue of 233 pulsar proper motions, significantly expanding the previous sample. The catalogue includes a wide variety of pulsars, such as recycled objects and those associated with globular clusters or supernova remnants. The majority of the proper motions (58%) are derived from pulsar timing methods, 41% from interferometers, and 1% from optical telescopes. The mean 1-D speeds for normal and recycled pulsars are 152(10) km s\(^{-1}\) and 54(6) km s\(^{-1}\), respectively, while the corresponding mean 2-D speeds are 246(22) km s\(^{-1}\) and 87(13) km s\(^{-1}\). PSRs B2011+38 and B2224+64 have the highest inferred 2-D speeds of \(\sim 1600\) km s\(^{-1}\). The study also examines the statistical properties of different subsamples and finds that the mean speeds generally agree with previous results. A novel deconvolution technique is applied to a sample of 73 pulsars with characteristic ages less than 3 Myr, yielding a mean 3-D pulsar birth velocity of 400(40) km s\(^{-1}\). The velocity distribution is well described by a Maxwellian distribution with a 1-D rms of 265 km s\(^{-1}\), and there is no evidence for a bimodal velocity distribution. The proper motions for PSRs B1830+08 and B2334+61 are consistent with their proposed associations with supernova remnants W41 and G114.3+0.3, respectively. The findings suggest that the true space velocities of young pulsars range from a few tens to over 1000 km s\(^{-1}\), with a mean velocity of 400(40) km s\(^{-1}\).