Timing observations of four millisecond pulsars with the Arecibo and Effelsberg radiotelescopes

Alexander Wolszczan, O. Doroshenko, M. Konacki, M. Kramer, A. Jessner, R. Wielebinski, F. Camilo, D. J. Nice, J. H. Taylor

Research output: Contribution to journalArticle

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Abstract

We present long-term timing observations of four millisecond radio pulsars with the 305 m Arecibo and the 100 m Effelsberg radiotelescopes. Our analysis of the combined pulse time-of-arrival data from the two telescopes has led to improvements of the precision of timing parameter determination for all the four pulsars. A new, much more significant measurement of a third-order spin frequency derivative of PSR B1257 + 12 adds to the existing evidence that a fourth, distant planet may orbit this pulsar. Proper motions have been measured for PSR J1640 + 2224, PSR B1953 + 29, and PSR J2229 + 2643. The derived low transverse velocities of these objects agree with the kinematic characteristics of the observed millisecond pulsar population. Exceptionally low spindown rates of PSR J1640 + 2224 and PSR J2229 + 2634 have been used to derive useful limits on the initial spin periods of these objects and on the variation of the gravitational constant G.

Original languageEnglish (US)
Pages (from-to)907-912
Number of pages6
JournalAstrophysical Journal
Volume528
Issue number2 PART 1
StatePublished - Jan 10 2000

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pulsars
planet
kinematics
time measurement
radio
gravitational constant
proper motion
arrivals
planets
telescopes
orbits
parameter
rate
analysis
pulses

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Wolszczan, A., Doroshenko, O., Konacki, M., Kramer, M., Jessner, A., Wielebinski, R., ... Taylor, J. H. (2000). Timing observations of four millisecond pulsars with the Arecibo and Effelsberg radiotelescopes. Astrophysical Journal, 528(2 PART 1), 907-912.
Wolszczan, Alexander ; Doroshenko, O. ; Konacki, M. ; Kramer, M. ; Jessner, A. ; Wielebinski, R. ; Camilo, F. ; Nice, D. J. ; Taylor, J. H. / Timing observations of four millisecond pulsars with the Arecibo and Effelsberg radiotelescopes. In: Astrophysical Journal. 2000 ; Vol. 528, No. 2 PART 1. pp. 907-912.
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Wolszczan, A, Doroshenko, O, Konacki, M, Kramer, M, Jessner, A, Wielebinski, R, Camilo, F, Nice, DJ & Taylor, JH 2000, 'Timing observations of four millisecond pulsars with the Arecibo and Effelsberg radiotelescopes', Astrophysical Journal, vol. 528, no. 2 PART 1, pp. 907-912.

Timing observations of four millisecond pulsars with the Arecibo and Effelsberg radiotelescopes. / Wolszczan, Alexander; Doroshenko, O.; Konacki, M.; Kramer, M.; Jessner, A.; Wielebinski, R.; Camilo, F.; Nice, D. J.; Taylor, J. H.

In: Astrophysical Journal, Vol. 528, No. 2 PART 1, 10.01.2000, p. 907-912.

Research output: Contribution to journalArticle

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AU - Jessner, A.

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AU - Camilo, F.

AU - Nice, D. J.

AU - Taylor, J. H.

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AB - We present long-term timing observations of four millisecond radio pulsars with the 305 m Arecibo and the 100 m Effelsberg radiotelescopes. Our analysis of the combined pulse time-of-arrival data from the two telescopes has led to improvements of the precision of timing parameter determination for all the four pulsars. A new, much more significant measurement of a third-order spin frequency derivative of PSR B1257 + 12 adds to the existing evidence that a fourth, distant planet may orbit this pulsar. Proper motions have been measured for PSR J1640 + 2224, PSR B1953 + 29, and PSR J2229 + 2643. The derived low transverse velocities of these objects agree with the kinematic characteristics of the observed millisecond pulsar population. Exceptionally low spindown rates of PSR J1640 + 2224 and PSR J2229 + 2634 have been used to derive useful limits on the initial spin periods of these objects and on the variation of the gravitational constant G.

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Wolszczan A, Doroshenko O, Konacki M, Kramer M, Jessner A, Wielebinski R et al. Timing observations of four millisecond pulsars with the Arecibo and Effelsberg radiotelescopes. Astrophysical Journal. 2000 Jan 10;528(2 PART 1):907-912.