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Proper Motion Measurements of Pulsar B1951+32 in the Supernova Remnant CTB 80 | | J. M. Migliazzo
; B. M. Gaensler
; D. C. Backer
; B. W. Stappers
; E. van der Swaluw
; R. G. Strom
; | | Date: |
3 Feb 2002 | | Subject: | astro-ph | | Affiliation: | 1 and 2), D. C. Backer , B. W. Stappers , E. van der Swaluw and R. G. Strom (4 and 6) ( MIT, CfA, UC Berkeley, ASTRON The Netherlands, IAS Dublin, University of Amsterdam | | Abstract: | Using the Very Large Array and the Pie Town antenna, we have measured the position of the radio pulsar B1951+32 relative to nearby background radio sources at four epochs between 1989 and 2000. These data show a clear motion for the pulsar of (25 +/- 4) milliarcsec/yr at a position angle (252 +/- 7) degrees (north through east), corresponding to a transverse velocity (240 +/- 40) km/s for a distance to the source of 2 kpc. The measured direction of motion confirms that the pulsar is moving away from the center of its associated supernova remnant, the first time that such a result has been demonstrated. Independent of assumptions made about the pulsar birth-place, we show that the measured proper motion implies an age for the pulsar of (64 +/- 18) kyr, somewhat less than its characteristic age of 107 kyr. This discrepancy can be explained if the initial spin period of the pulsar was (27 +/- 6) ms. | | Source: | arXiv, astro-ph/0202063 | | Services: | Forum | Review | PDF | Favorites | |
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