Tracking the footprints of the radio pulsar B172747: proper motion, host supernova remnant, and the glitches
arXiv:1904.06368 · doi:10.3847/1538-4357/ab1905
Abstract
The bright radio pulsar B172747 with a characteristic age of 80 kyr is among the first pulsars discovered 50 yr ago. Using its regular timing observations and interferometric positions at three epochs, we measured, for the first time, the pulsar proper motion of mas yr. At the dispersion measure distance of kpc, this would suggest a record transverse velocity of the pulsar km s. However, a backward extrapolation of the pulsar track to its birth epoch points remarkably close to the center of the evolved nearby supernova remnant RCW 114, which suggests genuine association of the two objects. In this case, the pulsar is substantially closer ( kpc) and younger ( kyr), and its velocity ( km s) is compatible with the observed pulsar velocity distribution. We also identified two new glitches of the pulsar. We discuss implications of our results on the pulsar and remnant properties.
21 pages, 13 figures; accepted to ApJ
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- Updated Proper Motion of the Neutron Star in the Supernova Remnant Cassiopeia A
- First detection of X-ray pulsations and spectrum of the high Galactic latitude pulsar PSR J0837-2454 and direct Urca cooling implications