A New HST Measurement of the Crab Pulsar Proper Motion
| dc.creator | Caraveo, Patrizia A. | |
| dc.creator | Mignani, Roberto P. | |
| dc.date | 1999-01-05 | |
| dc.date.accessioned | 2026-07-07T02:29:52Z | |
| dc.date.available | 2026-07-07T02:29:52Z | |
| dc.description | We have used a set of archived HST/WFPC2 exposures of the inner regions of the Crab Nebula to obtain a new measurement of the pulsar proper motion, the first after the original work of Wyckoff & Murray, more than 20 years ago. Our measurement of the pulsar displacement, mu = 18 +/- 3 mas/yr, agrees well with the value obtained previously. This is noteworthy, since the data we have used span less than 2 years, as opposed to the 77 years required in the previous work. With a position angle of 292 +/- 10 deg, the proper motion vector appears aligned with the axis of symmetry of the inner Crab nebula, as defined by the direction of the X-ray jet observed by ROSAT. Indeed, if the neutron star rotation is to be held responsible both for the X-ray jet and for the observed symmetry, the Crab could provide an example of alignment between spin axis and proper motion. | |
| dc.description | 4 pages, LaTex, 2 Postscript figures. Astronomy&Astrophysics-in press | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9901031 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9901031 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/13644 | |
| dc.subject | Astrophysics | |
| dc.title | A New HST Measurement of the Crab Pulsar Proper Motion | |
| dc.type | text |