Radio beam of the relativistic binary pulsar B1534 + 12

Z. Arzoumanian, J. A. Phillips, J. H. Taylor, Alexander Wolszczan

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We present high-resolution polarimetric observations and low-noise integrated profiles of the relativistic binary radio pulsar B1534 + 12. Roughly 20% of the main pulse emission is linearly polarized at 430 MHz. Our measurements are sensitive to low-level off-pulse emission and trace the variation in polarization angle through a substantial fraction of the pulse period. Within the rotating-vector model, two distinct sets of geometric parameters fit the data reasonably well. Both geometries imply that the pulsar is nearly an orthogonal rotator. We use this information to select one of the two equally likely values of orbital inclination obtained separately, from pulse timing measurements, and find that the misalignment between spin and orbital angular momentum is probably small. In addition to establishing the geometry of the system and providing clues to the relevant emission physics, our results form a pulse polarization template against which future observations can be compared in order to constrain or detect relativistic precession of the pulsar's spin axis.

Original languageEnglish (US)
Pages (from-to)1111-1117
Number of pages7
JournalAstrophysical Journal
Volume470
Issue number2 PART I
DOIs
StatePublished - Jan 1 1996

Fingerprint

pulsars
radio
polarization
pulses
geometry
precession
angular momentum
physics
orbitals
misalignment
low noise
inclination
templates
time measurement
high resolution
profiles
parameter

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Arzoumanian, Z., Phillips, J. A., Taylor, J. H., & Wolszczan, A. (1996). Radio beam of the relativistic binary pulsar B1534 + 12. Astrophysical Journal, 470(2 PART I), 1111-1117. https://doi.org/10.1086/177935
Arzoumanian, Z. ; Phillips, J. A. ; Taylor, J. H. ; Wolszczan, Alexander. / Radio beam of the relativistic binary pulsar B1534 + 12. In: Astrophysical Journal. 1996 ; Vol. 470, No. 2 PART I. pp. 1111-1117.
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Arzoumanian, Z, Phillips, JA, Taylor, JH & Wolszczan, A 1996, 'Radio beam of the relativistic binary pulsar B1534 + 12', Astrophysical Journal, vol. 470, no. 2 PART I, pp. 1111-1117. https://doi.org/10.1086/177935

Radio beam of the relativistic binary pulsar B1534 + 12. / Arzoumanian, Z.; Phillips, J. A.; Taylor, J. H.; Wolszczan, Alexander.

In: Astrophysical Journal, Vol. 470, No. 2 PART I, 01.01.1996, p. 1111-1117.

Research output: Contribution to journalArticle

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AB - We present high-resolution polarimetric observations and low-noise integrated profiles of the relativistic binary radio pulsar B1534 + 12. Roughly 20% of the main pulse emission is linearly polarized at 430 MHz. Our measurements are sensitive to low-level off-pulse emission and trace the variation in polarization angle through a substantial fraction of the pulse period. Within the rotating-vector model, two distinct sets of geometric parameters fit the data reasonably well. Both geometries imply that the pulsar is nearly an orthogonal rotator. We use this information to select one of the two equally likely values of orbital inclination obtained separately, from pulse timing measurements, and find that the misalignment between spin and orbital angular momentum is probably small. In addition to establishing the geometry of the system and providing clues to the relevant emission physics, our results form a pulse polarization template against which future observations can be compared in order to constrain or detect relativistic precession of the pulsar's spin axis.

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