Altitude Limits for Rotating Vector Model Fitting of Pulsar Polarization

Abstract

Traditional pulsar polarization sweep analysis starts from the point dipole rotating vector model (RVM) approximation. If augmented by a measurement of the sweep phase shift, one obtains an estimate of the emission altitude (Blaskiewicz, Cordes, & Wasserman). However, a more realistic treatment of field line sweepback and finite altitude effects shows that this estimate breaks down at modest altitude ~ 0.1R_{LC}. Such radio emission altitudes turn out to be relevant to the young energetic and millisecond pulsars that dominate the γ-ray population. We quantify the breakdown height as a function of viewing geometry and provide simple fitting formulae that allow observers to correct RVM-based height estimates, preserving reasonable accuracy to R ~ 0.3R_{LC}. We discuss briefly other observables that can check and improve height estimates.

References in corpus (9)

• An empirical model for the beams of radio pulsars
• Profile morphology and polarization of young pulsars
• Pulsar Pair Cascades in Magnetic Fields with Offset Polar Caps
• Five New Millisecond Pulsars From a Radio Survey of 14 Unidentified Fermi-LAT Gamma-ray Sources
• Altitude-dependent polarization in radio pulsars
• The High Time Resolution Universe Pulsar Survey IV: Discovery and polarimetry of millisecond pulsars
• The complex polarization angles of radio pulsars: orthogonal jumps and interstellar scattering
• Observations of Energetic High Magnetic Field Pulsars with the Fermi Large Area Telescope
• Sub-luminous gamma-Ray pulsars

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• Fermi LAT pulsed detection of PSR J0737-3039A in the double pulsar system
• Six Faint Gamma-ray Pulsars Seen with the Fermi Large Area Telescope -- Towards a Sample Blending into the Background
• Meterwavelength Single-pulse Polarimetric Emission Survey IV: The Period Dependence of Component Widths of Pulsars
• General-relativistic pulsar magnetospheric emission
• Polarized emission from of an off-centred dipole
• A broadband radio study of PSR J0250+5854: the slowest-spinning radio pulsar known
• Pulsar polarimetry with the Parkes Ultra-Wideband receiver
• Tackling Radio Polarization of Energetic Pulsars